It works so far. Keeping it simple, I got a 16" piece of anodized aluminum with a very thick wall and bedded that in with silicon. I decided epoxy was over-kill. I wrapped the joint with rigging tape, because it was thicker and more rubbery and doesn't have the gooey adhesive of duct tape or electrical tape. I didn't fly the spin because there was W-A-Y too much wind for me, but the rig did survive a fairly radical pitch-pole.

I did nothing to the other end, just filed it flat and took off any sharp edges.

$3.00 for the alu sleeve; $1.50 for the silicon; the tape I already had on hand.