Valley - is that adjustable up and down? If so - how much travel is there? My son and I keep going back and forth. Mount low, mount high? He was for low and I was for high initially - now we've reversed positions.
We checked our design out and we could increase the travel up to 8" without much trouble - but we're not sure what that will gain us. For a 16" dia block - we're going to want to split it into 6 anyway so don't need to be able to lift the horizontal up to the middle (8") mark anyway.