This is a fixure for a Dremel/Multitool extension. I use it to cut the rudders in composite wings (CfK). The circular saw has an offset to the ruler (fixed to wing with double site tape) by 5mm.
Works for 20mm diameter mutitool extension.
Circular saw with min 22mm diameter required (diamond blade reccomended).
Disclaimer: This tool is to be used at your own risk. Please wear proper protective clothing while using. I would not be responsible in case of injury, physical damage or improper use of these files/ planes and how they are used.
For more composite RC plane stuff & fast planes visit my website: cfd.koelleteam.de
set wall thickness to min 1.2mm