Hmmm... I do love some good test flying. I'll do it.
I'm thinking I'll set up stable hands-off level flight at maybe 8500 feet, 90-120 KIAS (my Vg is 90), probably 17" MP, and then a few methods for the descent:
1) Pull it back to ~14" (that's the most I can do without setting off the gear warning)
2) Leave power alone and drop the gear.
3) Drop the gear AND power to idle.
I'll keep the wings level visually for the first few hundred feet, and then pretend that from 8000 to 2500 (~1500 AGL here) is a cloud deck, and see how long I can remain within a normal flight envelope while not making corrections.
Then, maybe I'll make a video about it...