This one
https://www.thingiverse.com/thing:3508115
I tried another different one and it’s a good design but for the life of me can’t figure a way to get the light sensor tube to fit on it. For the one that I posted the link too I’m trying to print a small adaptor to attach the drop tube to the die. I’m sure it’s something you could do easily. Will find out in a few minutes when it’s done.
They do work, Karl Bibb is making them with good luck. Broke down several months ago and bought one from him for my .32 acp and works perfect.
Got some little ball bearings on the way as well. If ya need some let me know