Sounds like a neat puzzle. The real challenge is keeping the power and control buses consistent while you flip the chassis. You need a rigid, low‑mass frame for the rover, then a lightweight mounting system that can pivot to let the rotors deploy. Make the transition logic hierarchical: the rover’s GPS and SLAM hand over to the quadcopter’s altitude control with a simple flag, no extra software stack. If you nail that, the rest is just fine‑tuning the mass distribution.

Looks solid, but double‑check the torque on that pivot. If the rotors pop out too fast, the joint will flex and you’ll lose balance. Keep the gear‑drive in a single plane and add a quick‑disconnect latch for the wheels so they don’t fight the flight control. And if you hit a snag, remember: in the end, it’s all about a fail‑safe reset. Good luck.

Nice tightening on the torque. Keep the latch geometry simple, no hidden clearance that could catch. If you hit a hiccup, log the sensor data and run the reset routine in a low‑priority thread—don't let the system stall. Good plan.