I’ve been doing 3d carving of graphite (see Has anyone carved Graphite? - #9 by Fredini) using Dewalt 611 with a 1/4" endmill to rough cut, then 1/8" ball nose. The only issue I am having is that I have maxed out the length of the bits, which only give me 1 1/2" max workable depth. Can anyone recommend a source for longer version of these bits? I’d like to be able to go up to 2" deep.