Steve,
Add these things to Wouters instructions:
-make sure when rotating that your rotation adjuster is off and you can rotate compleletly
-You can visually see the hook go above the head of the mast, while it is up above the top watch as you rotate and you can tell which direction is lock and which is release.
-I also use a plastic washer to keep the halyard from pulling thru the headboard.
I have the same system on a Tiger and now prefer it to the hook and ring.