ok, i'll check it when i get home.  I jsut assumed that the small amount of brass colored tubing i could see on the back side fo the strut was the end of the stuffing tube.  But what you're saying is that the part i can see is actually the bushing? If that's the case i'm pretty sure i've managed to wear it down.  I think i get about 0.5-1mm of play from side to side, measure at the center of the rear of the prop thread on the stub.  I always greased the drive assembly after every 2-4 runs with some purple drive cable grease the seller threw into the box when i got in from the RCU marketplace.  I think i've put a little over a gallon of fuel through it.  That doesn't seem like enough time to wear that bushing down, but you guys would know better.....?