M9 Gimbal, don't know what the hype is?
I was sadly disappointed. One gimbal had a seized bearing on its roll/yaw axis, I managed to free it up after taking the gimbal apart and putting a drop of oil on it. Once installed the gimbals felt cheap making a tinny sounding click in the center compared to the stock ones which make a softer clunk. I then tried to increase the stick height, took the grub screws out, and the knurled knobs were seized on, one came loose with pliers but ruined it in the process and the other started spinning inside the plastic. At this stage I gave up and put the stock ones back on. Don't know what the hype is around these because the 2 I got are crap.
This has got to be hands-down one of the best purchases I have made to date, no lie, no ones paying me. The installation was the 6 screws on the back of the taranis, and 4 screws for each gimbal (I bought 2, duh) & unplugging the old - plugging in the new. You dont have to think about anything.
The actual flight characteristics are improved in flight because of the much smoother movements, better precision, and the springs give you a pleasant tension or resistance that makes performing aerobatic flips much easier. It is remarkable the difference betweeb stock and this gimbal.
In addition, the sticks are made of metal and your fingers can more firmly grasp the crown. I cannot recommend this more-- in fact I recommend just saving the additional cashola and buying it WITH your initial purchase of a taranis X9D.
Just start with the right stuff and get ripping right, right away! ;)