Ok DB. The question regarding the retracts was not in reference to a leak down test but to the fact that the large (a bit heavy) wheel when subjected to the G-force of say a loop, that the wheel would start pulling out of the well. Normally I pump my retracts to at least 150 psi before takeoff. If you pump up the retract to 150psi can you pull the wheel down by hand?
This problem was first reported by "Growler84" reference this post .
http://www.rcuniverse.com/forum/fb.asp?m=9883635