I have a fairly chunky fan duct that I've added to my FlashForge Creator Pro. It was the only one I could get to print reliably enough without already having one.
It sticks out so far that it can hit the door on the front of the printer.
So I'd like to make it so that the build volume is shrunk in the Y axis by about 20mm like this:
What's the best way to do that in Simplify3D?