As I recall John Miller flew his Bonanza until age 101 (the last few years with a safety pilot). It may have been his 35000 hours in a cockpit. Or it may have been his time in the Kellett KD-1 or his own Pitcairn PCA-2 that kept him young.
Dick DeGraw designed and built this,
Here's some background info on Dick, including some earlier designs,
You can PM user All_In to inquire about contacting Dick Degraw,
https://www.rotaryforum.com/conversations/add?to=All_In
Congrats on the Carbon Cub. What specifically are your needs that the gyro you need "hasn't been built yet". That's an interesting comment.
Do the AutoGyro certified models use control cables, anyone?