# 2.6.4 Auto-Invert standard lateral pitches when changing from RH to LH # Auto-Invert standard lateral pitches when changing from RH to LH 2.6.4 auto The **Auto-Invert** setting controls whether Spectre Cloud automatically mirrors lateral pitch values when a spec sheet is switched between a **right-handed (RH)** and **left-handed (LH)** bowler — or when a new spec sheet is created for a left-handed bowler based on an existing right-handed template. Because lateral pitch directions are physically opposite for RH and LH bowlers, a value that is correct for one hand will be incorrect for the other without inversion. This setting handles that conversion automatically. ## 📐 Why Lateral Pitch Inverts Between RH and LH Bowlers Lateral pitch is defined relative to the bowler's grip — specifically, toward or away from the ring finger side. Because the hands are mirror images of each other, a pitch direction that moves toward the ring finger on a right-handed bowler moves in the physically opposite direction on a left-handed bowler. If a spec sheet or template is copied across handedness without inverting lateral pitch, the drilled result will be a mirror-image error. - ✅ **Right-handed bowler:** lateral pitch toward the ring finger tilts the hole opening to the right when viewed from above. - ✅ **Left-handed bowler:** lateral pitch toward the ring finger tilts the hole opening to the left — the physical opposite direction. - ✅ Auto-Invert handles this conversion silently — the fitter sees the correct value for the bowler's hand without needing to manually reverse any figures. - ❌ Without Auto-Invert, copying a spec sheet or layout from a RH bowler to a LH bowler without manually checking and reversing lateral pitch values will produce an incorrectly drilled ball. **Note:** Auto-Invert applies to **lateral pitch values only** — forward/reverse pitch and span measurements are not affected, as these do not change direction between RH and LH bowlers. ⚠️ *Verify with your Spectre team: confirm the complete list of fields affected by Auto-Invert, and whether any additional values beyond lateral pitch are inverted.* ## 🛠️ Enabling or Disabling Auto-Invert 1. Navigate to **Settings** from the top menu. 2. Locate the relevant settings section. ⚠️ *Verify with your Spectre team: confirm the exact section name for 2.6.x settings, consistent with earlier pages in this chapter.* 3. Find the **Auto-Invert** option. 4. Toggle the setting on or off. ⚠️ *Verify with your Spectre team: confirm whether this is a toggle, checkbox, or other control.* 5. The change takes effect immediately for all subsequent handedness changes and spec sheet operations involving a switch between RH and LH. ⚠️ *Verify with your Spectre team: confirm auto-save behavior, consistent with other settings in this chapter.* ## 📊 Auto-Invert in Common Workflows Auto-Invert is most relevant in three specific situations. In each case, enabling the setting means the fitter can proceed without manually checking and reversing lateral pitch values.
WorkflowWithout Auto-InvertWith Auto-Invert
Cloning a RH spec sheet for a LH bowlerLateral pitch values carry over unchanged — must be manually reversed before drillingLateral pitch values are automatically mirrored on clone
Switching a bowler's handedness setting on their profileExisting lateral pitch values remain as entered — no automatic correctionLateral pitch values on associated spec sheets are updated to reflect the new handedness
Creating a new LH spec sheet using a RH templateTemplate lateral pitch values must be manually inverted before useTemplate lateral pitch values are automatically mirrored when applied to a LH bowler
**Note:** ⚠️ *Verify with your Spectre team: confirm which of the three workflows above Auto-Invert actually applies to in the current version of Spectre Cloud, and whether "switching a bowler's handedness on their profile" retroactively updates existing spec sheets or only affects new ones created afterward.* ## 🔗 Relationship to Other Auto-Suggestion Settings Auto-Invert works alongside the other auto-suggestion settings in chapter 2.6. It is most closely related to Auto-CLT (2.6.3), since CLT-based lateral pitch suggestions are also direction-sensitive. - ✅ When both **Auto-CLT** and **Auto-Invert** are enabled, a CLT-based lateral pitch suggestion generated for a LH bowler will already reflect the correct direction — Auto-Invert and Auto-CLT work in the same direction, not against each other. - ✅ Auto-Invert also applies to manually entered lateral pitch values, not just auto-suggested ones — any lateral pitch on a cloned or templated sheet is subject to inversion when handedness changes. - ✅ The inverted value respects the **right pitch as positive** sign convention set in **2.4.1** — the sign will flip correctly for the LH bowler's convention. ⚠️ *Verify with your Spectre team: confirm that Auto-Invert correctly interacts with the 2.4.1 sign convention setting for LH bowlers.* ## ⚙️ When to Consider Turning Auto-Invert Off - ✅ **Shops that never clone specs across handedness** — if your shop always builds LH spec sheets from scratch, Auto-Invert has no effect and can safely be left off without risk. - ✅ **Training new staff** — disabling Auto-Invert requires trainees to consciously identify and reverse lateral pitch values when working across handedness, reinforcing the underlying geometric logic. - ✅ **Workflows with manual handedness management** — some shops maintain separate template sets for RH and LH bowlers and prefer explicit control over every value rather than automatic inversion. - ❌ Turning Auto-Invert off in a shop that regularly clones specs or shares templates across RH and LH bowlers significantly increases the risk of drilling an incorrectly pitched ball — the error may not be caught until the bowler has thrown several games. ## 📌 A Note on Ambidextrous Bowlers Some bowlers throw with both hands — for example, switching to their non-dominant hand for spares. If separate spec sheets exist for both hands, Auto-Invert ensures that lateral pitch values are correctly oriented for each hand when spec sheets are created or cloned across handedness. - ✅ Maintain separate bowler profiles or clearly labeled spec sheets for each hand. - ✅ When creating the second-hand spec sheet from the first, Auto-Invert will handle lateral pitch direction automatically. ⚠️ *Verify with your Spectre team: confirm whether Spectre Cloud supports recording both RH and LH spec sheets under a single bowler profile, or whether separate profiles are required for ambidextrous bowlers.* ## ☁️ Scope of This Setting This setting is stored at the account level and applies to all spec sheet operations across all devices. ⚠️ *Verify with your Spectre team: confirm per-user vs. per-account/shop scope — resolving this question here and applying it retroactively across all affected pages from 2.3.5 onward remains an outstanding action for the Spectre team.* ### Related Sections - 2.6.3 — Auto-CLT: lateral pitch of fingers based on CLT chart - 2.6.2 — Pitch suggestion: auto forward pitch based on hand flexibility - 2.6.1 — Overview: why leaving all auto-suggestions on saves time - 2.6.5 — Next auto-suggestion setting *(if applicable)* - 2.4.1 — Does your machine display right pitch as positive? Y/N - 3.x — Bowlers: recording handedness in a bowler profile - 4.x — Spec Sheet: cloning and applying templates **Tip:** Left-handed bowlers make up roughly 10–15% of the bowling population — a busy shop will fit several per week. Auto-Invert is a small setting with a disproportionately large safety payoff: one enabled toggle prevents a whole category of handedness-related drilling errors from ever reaching the press. ```