Hello Tnott,
Firstly, thanks very much for your interest and guidance. Much of the design evolution I'm undertaking comes from your lead.
I agree that the rocker of the link I put up is light. I would still look at a double layer of ply for the base of the rocker. This puppy will still be heavy for sure.
I am not rushing into DSC's. Later maybe, however thanks for the forsight of the need of a central pivot for the use. I'll probably just remake the rocker and base should I feel so inclined. Or if I totally botch-up this style of pivot, I'll default back to a central pivot.
Placing the teflon pads below the alt-bearings I had not thought of,
! I'd be looking at this regardless of design.
Question, why are these rocker-ground-board designs called 'flex-rocker'?