I finished mine yesterday. I previously used a pulley system used to dress deer in the field to hoist up each of my Pescador and Tarpon 160. These worked well for the past year, but those kayaks were recently sold to get an Outback and PA. The PA is a big girl and I did not feel the single pulley system was strong enough.
Old "deer" system:
New lazyman's system:
Video - In action:http://www.youtube.com/watch?v=1xcuITMx ... r_embedded
Total cost was about $200, the hoist was 1/2 of that. The hoist does have a safety stop to prevent it ripping the pulleys off the rafters and damaging my autos when the yaks are fully up. I also attached 4 straps at each corner to support the whole system which is used when the kayaks are all the way up. Most of the tension is removed from the hoist pulleys after attaching the straps. The hoist is only used to raise and lower the yaks, not to suspend them during storage.
I still need to center the hoist with the cable angle to even wrapping on the spool. This will be done this weekend.