Many thanks for the reply. I'm waiting for all the materials to arrive I've now ordered to assemble this set-up.The best bit of improvised equipment I've ever seen! If you've got the time and energy you should look to patent that design and sell it to the likes of Powertec, Bodysolid, Bodycraft etc. There's nothing on the market like it for racks, I've looked! I couldn't afford the cost or space needed for a cable machine so was delighted when i saw this and I'm sure this idea would really catch on for the home gym market!Thanks again.