George,
The 9451 a great have been using them on ailerons in some of my pattern planes. Have not had any problems with them. The are fast. I check the slop and there was none in the servo just a little bit in the linkage but not to bad. On thing have good batteries in your plane.

I have a BME 37% Ultimate were I will be using Futaba 9351. 192oz .13 sec on 6 volts. Standard size.



Mike