Helidreamer, if there's stil a piece inside the main shaft, and the retaining pin broke in three pieces, then the piece inside the shaft should not be contacting the rotor head assembly, or if it is it will be very minimal. Have you tried pulling the shaft out of the rotor head assembly? IF it won't go out with a good amount of force, then forget that. The next thing I would try would be using a flashlight and finding that pin. However, if part of the pin is still poking out of the shaft and is going into the plastic, then it should be going through the holes in the rotor head assembly where it should go, right? So then if you stuck a paper clip (use pliers to secure it) it should come out.

I did the safety pin switch, but the only problem I had was that the pin was too long. However, since I trashed my last canopy and I had the four rubber mounting grommets, I simply took two of those and stuck one on each side of the safety pin, then closed it. Now it won't flop around or spin easily, the grommets act as a buffer in impacts, and it can be easily removed. If you're using a somewhat large-sized safety pin, give that a try.

Just ordered my replacement servo, along with two main shafts and a canopy...should be in Friday. I bought a replacement rotor head at the shop, and sure enough, the fit was tight. I followed Horizon's advice of using a 5/16" drill bit to enlarge the hole slightly and it fit fine, however there were some plastic shavings from the drilling that were still in the head, so I had to file them out (which didn't get the smaller ones out), then I tried a little compressed air from a scuba tank, no luck, small screwdriver to push them out, no luck.... I had to disassemble the rotor head piece itself and then use a tiny screwdriver to coax the stubborn shavings out. So if you have to do this mod, I recommend you disassemble the rotor head so you only get that central tube piece, and then drill it. It will make the process much easier and it will make centering the drill in the hole easier as well. But make sure you have the rotor head arranged the right way or you'll get the knobs backwards where the pitch links go in!

Wombat out.