Ok so it's not really a plate on the Flash5x, there's a metal clip that presses against the ridged plastic on the backside of the throttle. I just bent it slightly away. It is a little quirky to get the hang of, but I can get the HB a lot more steady in the vertical axis now. I'm not to the point of doing pirouettes so I'm letting my thumb sit on the moving part of the throttle, not the stick, so that I can keep a sense of stability.