RE: Servo Mod For Clark Board?
If using a servo for elevation no mod is needed other than attaching a servo delay in line with the servo to slow it down. This one slows the servo and will also keep the postion when the stick goes
back to neutral. Most servo mod's are for recoil and yes it's so it spins 360, so you have to take the stop tab out, and the ESC board to leave just the motor.
http://dionysusdesign.com/product_info.php/products_id/190/osCsid/4082e4f57ac487a805fabaf3ab69fdf1