If you're looking for other projects, how about the ring that keeps the shifter boot in place, or the antenna delete plug? Or what about Comanche emblems in minature for fridge magnets?
No, I'm looking at what's out there and wanted some real world feedback.
I'm going through this right now https://all3dp.com/1/best-free-3d-modeling-software-for-beginners/
maybe freeCAD?
That metal plate is an attachment point to the frame, it's there on my 90. The one in your picture looks just like mine with the three large holes but mine does not have grommets. Glad you found your way over here.