Hi Johnny,
I just downloaded Fusion 360, as part of doing a TCB arduino shield in Eagle, so I can now modify the STEP or Parasolid files you offered, would you still be willing to post them?
I'm working on upgrading my T55A to a TCB from a Clark TK22, and a smaller speaker would work much better. I also have to fit some HK45A ESCs into the space. So modifying something would be much better than starting from scratch? I'm ordering a Benedini Mini, to give it some sound presence too.
Thanks again, Jerry