Thanks Paul, and speaking of hauling beans, more weight in an IRRA® stock car never hurts.
My ol' 2009 Bill Worden/Rob Hanson tripod chassis needed freshening up so I built a ground zero 15 thou shaker platform for it.
.063 tubing governed with .020 piano wire. Some fore and aft movement, slight wiggle, slight lift, and zero droop.
No solid connection between the rails. Champion 7 gram weight attached via double sided wing car tape