What 3D modelling services could I use to create custom LEGO pieces? I want to create some custom LEGO Technic pieces, but I can't seem to find any software that is good at making it. I have tried using Blender, but it is hard to create holes.
Do you have any suggestions?
I haven't tried creating my own parts. However, I've seen that Bricklink's PartDesigner is quite popular in the community.  It looks like the creation process is quite streamlined, you can edit the connectivity info of each piece, and it plays very nice with Bricklink's Studio.