Can’t yet comment on the Dust Shoe lack of cutting depth dilemma as I’m just about to build my own but while I was working out the design I realized that, at least with the shorter 1/8 Inventables Bits that I’m using, I’m barely left with any cutting depth once the whole thing would have been assembled so I had to reconsider some design ideas - One has to take the Clamps into consideration too ;(
For now, instead of using a 2-Layer Acrylic design + Bristles, I’m going with a simpler but still height adjustable 1-Layer Debris Shield design that will hopefully prevent the larger and thus more kinetically prone particles from flying entirely out of the then just nearby and not anymore above the Drill Bit located Vacuum Pipe.