A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Herman Dekker
Date: 2017 Oct 17, 02:33 -0700
Thanks for your care, I know, if you have to drill in brittle clear material.
(a lot is (pmma) perspex), then use one older blund drill.
A new drill is to sharp and byts directly in the material that give cracks.
Also use a low speed for drilling.
I learned this from my business neighbour, he has a plastics productionshop.
He laser cutted a small T-plotter for me, but I find it most times to big for plotting.