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2.6.9 Autofill Cut to Cut measurement based on insert type/size

2.6.9   setting

The Autofill Cut to Cut auto-suggestion calculates a spec sheet's Cut to Cut (C) span for you, so you don't have to measure it separately or subtract the insert thickness by hand. It derives the value directly from the Full Span already on the sheet — but it only runs when every input it depends on is present.

Note: This page covers the auto-suggestion setting. For what the Cut to Cut span type is and how it differs from Full Span, Outer to Cut, and Hole to Hole, see 4.1.2. For the span type acronyms (F, C, O, H), see 4.1.1.

🛠️ What This Setting Does

Cut to Cut is the Full Span minus the thickness of the insert — the span measured to the actual drilled cut of the finger hole, before the grips are accounted for. Instead of measuring that value at the bench or doing the subtraction mentally, Autofill Cut to Cut computes it from information already on the spec sheet.

  • ✅ Removes the mental math when drilling thumb-first — the Cut to Cut value is ready to work from at the press.
  • ✅ Keeps Full Span and Cut to Cut consistent with each other, since one is derived from the other.
  • ✅ Reduces measurement error — the value is calculated, not re-measured.

📐 How the Calculation Works

Autofill Cut to Cut uses the insert type and insert size to determine the wall thickness of each finger's insert, then subtracts that thickness from the Full Span:

Full Span − insert wall thickness = Cut to Cut

The insert type and size are what tell Spectre Cloud how thick the insert wall is. Without them, there is no wall thickness to subtract, and the calculation cannot complete.

📋 Requirements — What Must Be Present

The calculation runs per finger, and it needs complete information for both the middle and ring fingers. If any single input below is missing on either finger, Cut to Cut will not auto-calculate.

Required input Middle finger Ring finger
Full Span measurement ✅ Required ✅ Required
Insert type ✅ Required ✅ Required
Insert size ✅ Required ✅ Required

Important: All three inputs must be present on both fingers. If even one finger is missing its Full Span, insert type, or insert size, the Cut to Cut value will not populate.

🗓️ Enabling Autofill Cut to Cut

  1. Open Spectre Cloud at cloud.spectrebowling.com and log in.
  2. Select Settings from the menu.
  3. Locate the Autofill Cut to Cut auto-suggestion and enable it.
  4. Changes are saved automatically.

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❄️ Troubleshooting — Cut to Cut Isn't Filling In

If the Cut to Cut value stays blank, the cause is almost always a missing input. Check, for both the middle and ring fingers:

  • ✅ Is the Full Span entered on both fingers?
  • ✅ Is the insert type selected on both fingers?
  • ✅ Is the insert size selected on both fingers?
  • ❌ If any one of these is blank on either finger, the calculation will not run until it's filled in.
  • 4.1.2 — Span types: Full Span, Cut to Cut, Outer to Cut, Hole to Hole
  • 4.1.1 — Understanding acronyms: F, C, O, H
  • 2.6.8 — Auto-Calculate Ring Span: based on the 5/16" rule
  • 2.6.6 — Autofill Insert OD: drill bit size per insert type and grip

Tip: Enter your Full Span and both inserts (type and size) before reaching for the Cut to Cut field — as soon as all six inputs are in place, the value fills itself in. If you drill thumb-first, this setting is one of the biggest time-savers in your workflow, since it hands you a ready-to-use Cut to Cut number with no bench measurement and no mental subtraction.

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