The drawer slides are listed as 28", but they measure 27 1/2. They are rated at 100 lbs each. Cabinet parts dot com.
The pulleys took some looking. I almost went with old window sash replacement pulleys but these were much cheaper although overkill. These came from e rigging, surface mount pulleys. ~$48 shipped for all 6. They are 1" diameter at the bottom of the groove. It just worked out that 3/4" spacers result in about 1/4" peaking out beyond the plywood. I used a 3/4" mortising chisel to cut the openings and a 3/8 chisel to cut clearance for the rivet shaft.
The interesting part was what to do with the spring and weight on the cable just above the hook. This weight would move a lever and trip the limit switch when the cable was fully retracted. I cut the hook off and as show before I left the weight at the hoist.
This is what I came up with. In the up position there is spring tension but the bolt prevent fully compressing it.
When the table is down the spring tension is reduced and the cable end has little tension. If you look closely to the left of my finger you can see the pencil marks in the plywood where I measure how much movement there was at the bolt.
