These 3d printed ball adapters work great! I thought that the adapter plates that come with these are too heavy so I designed and printed these white adapters, now I use them on all my models – much better than sticky foam plus they are removable!

Finally here is the test flight, note how relatively stable the tricopter is. This is without any prop or motor balancing and with stock PID setting, absolutely no tuning.

Cheers,

//starlino//