Using them is not a problem as long as you understand the limitations. When you start out on quads occasional uncontrolled spins are inevitable. That's when you learn from experience. If you go in aware of that possibility it is less dramatic and less traumatic. The "I knew that was going to happen" mind-set kicks in and you're not quite as surprised and don't have to hit the panic button. Less unexpected results is a good thing most of the time.
Testing process has been good, found I wanted less pull and added yet more venting to both the XT and HV... No videos yet, still ultimately waiting for a solid 35+ mph day to give these a solid pounding.
Flying from a vehicle gives some sense of it, but also makes for bad posture and hand position so the data gets a little confused.
Will update again when I have something worth sharing. ✌️