Hi Peter, it takes a bit of stuffing round to get the 2:1 ropes lengths correct, you need to measure how much downhaul travel required then double it and find a spot on your mast that has that much clear space for the pulleys on the tail of the 2:1 to travel. Sounds confusing doesn't it? I have attached a photo I took in my shed, I was waiting for a rigged up pic but didn't sail on the weekend.