Langdon,
You can check out the mast track pin and Universal Joint at this link:
http://www.star-board.com/2010/produ...ccessories.php
The latch handle on the adjustable mast track "car" has 2 SS pins (it's actually a
U shaped piece of heavy gauge SS wire) that slide into the groove near the bottom
of the special SS pin, which screws together under the rubber universal joint.
Hope this helps,
Roger