I'm in the process of upgrading, AGAIN! I currently have a 2nd hand Quadrapsire rack which does duties for the Garrard 301. I wondered if Birchply is considered a better substitute than MDF. I'm trying to dampen down any vibration in the equipment rack as I have two big valve based components. The 301 is pretty well protected but I figured I could go one better. I have some 18mm birchply in the garage and wondered if it would be worthwhile replacing the Quadraspire racks with the Birchply, any thoughts?