Very nice what everyone has done to there PM1236. I've only made a 5C collet closer for mine and just last night started the install of my DRO. As for your 30/40/50 taper tooling it was designed to be a fast release taper. The taper doesn't hold the tool like an MT taper, JS taper, R8 taper does. The taper in these fast taper tooling is for locating the tool. The drive lugs are what provide positive motion. I've a very large fan of the BT30 tooling for small machines. It's fairly cheap and makes changing tools easy with a good tool holder on the bench. I also like to use collet tooling in these a little more but a set-screw tool holder is still needed for heavy loads like a 3/4" EM running at max DOC max chip load.