It would be cool if we could model and import custom tool head models into S3D.
This would help detect / prevent collisions during multi-part prints.
My Ultimaker2 has very little clearance near the nozzle (3mmish), but it has tons of clearance else where.
Also the tool head is not symmetric around the nozzle.
I'm not looking for collision detection (that's the next step), but just a way for me to visually check things during the print preview.