For all you modelers out there that have been having trouble with the 615 rotating retract. I think I have found a solution to your whoas. I finally figured out a way to make a rotating retract that doesn't have a gear that pops out nor a spring that would come loose. You wont believe just how simple it is and what to do to fix it or build a better one and all it takes is a little knowlage and just one pice of music wire. Let me know just how many of you guys are interested and I'll do a little dodoling and figure just what to do with this little invention. My prototype works like a charm and doesn't catch or hang up and rotates very smooth. One way or the other I will keep you all posted on the outcome of what I have built.