Thanks man. Yes Max McAllister from Traxxion Dynamics, Georgia. I won’t lie, his views on rockers v springs v inflatables were a big influence. IIRC he uses ALU because in his opinion it offers a more “lively” action. We haven’t found our birch ROCKITs to be dull, and actually believe your floor surface has a greater effect on action r/t material used to construct your rocker plate. Our design uses 3 rocking ribs instead of 2, and we use industrial standard dimpled rubber on the underside of each rocker, so I’d like to think we’ve addressed and resolved any concerns about uneven wear. Also the 3 rib design means there is virtually zero chance of the wood warping due to the increased contact / rebated / glued areas. We also use superior grade 18mm Baltic birch ply...some designs use only 2 ribs, lower quality wood and/or thinner cuts which obviously increases the risks of things getting out of true.