My first 1980 FMS SC20 had the cable with the hook that inserted into the back of the main luff bolt rope track. It was great raising but sometimes needed needlenose pliers to pull it out. My second SC20 as well as my ARC22 are similar to what Mosley related with the luff bolt rope and halyard running in the same track. I hate that skyhook but when its up its up...

thom