RE: cheap but good servos for a 500
Nope. I just called Heliproz and explained what had and I had read somewhere there was a spacer kit to adapt the 225's to the 500 servo opening. Rick said sure you needone of - these adapter kits. Credit card number - priority mail - wala - three days later a little bag of parts that fixed the problem.
Now I have a bench full of 550e pieces I am putting together.
Jim