I would go with rope ratchets, just the generic brand they sell at your local hydroponic store will do wonders. I prefer them over grow yoyos, easy to adjust and easy to setup. They are also strong and long lasting.
Hey, I stumbled upon your post in the ebb and gro users thread and was wondering what those little pot holders are actually called and if I could find them at a nursery or my local hydroponic store. The solution is brilliant for raising the buckets and it looks great too.
Much love,
Roll