Does the drilling angle matter on Symmetric balls?

This question appears to be asked again and again on If you don’t know anything about the Dual Angle Layout Technique, please feel free to read the introductory pieces I wrote on it’s use and application.

Dual Angle Layouts – Totals and Ratios

This is a continuation of the series of posts about the Dual Angle Layout Technique. I strongly recommend you read the Introduction piece first, then return here to continue reading.

Mo Pinel’s Double Thumb Layout explained

As an active member on, I see and help field a lot of requests for layouts and general advice about bowling balls, surfaces, etc. as well as a lot of some of the more technical details of bowling.