"wrong" side cut kerf subtraction guide

Designed for 2.4mm kerf circular saw blades for those times when you need to make a cut on the "wrong" side (i.e. not the waste side) of your work.

Provides a 2.4mm spacer that can be placed along side your track/straight edge and offset the measurement by the precise amount needed to account for the saw kerf

Added a spacer for 1.8mm kerf blade. Note that it spaces out 2.08mm which is the width of my 1.8mm

FreeCAD file is included to allow for customisation to other saw kerfs