Baluga,
Yes i did. I use the alu servo-stays (better), a kimbrough servosaver and a hitec digital servo and these are just fine (sorry for misunderstandig your item). The problem is that, just as you descibed, after a hit the servo is out of alignment. It corrects itself after disconnecting the batteries or another hit ..... no joke. Guys who are running other chassis types and other servos, even your KO, have the same 'problem'.
As far as I know there is no obvious solution and is something we just have to live with.
I can only say and advise.... stop hitting the wall
Marc