Thanks everyone for your helpful feedback.
I think Todd's solution may be the most effective, although I will use the aluminum tape also if the strut/trunion fitment is too loose.
rcand,
I considered replacing the retract units themselves, but since I've dropped about $400 in struts/wheels/brakes already, I'm trying to save a little money keeping the retract units.
However if the replacement trunion blocks aren't readily available from SM/X-treme Jet, then I'll definetly be giving Todd a call.

???Anyone know where we could purchase CF wing tubes for the Dragon? Diameter is 1.250", or 31.75mm.

Thank again everyone.
Jim