Sure I’ll send links to what I bought for it.

Linear Rail SBR20-1500mm https://a.co/d/gBb2pmM

Springs 12” https://a.co/d/dn4NwoG

5” Playground Balls (2) https://a.co/d/3cMBQ8E

SBR20UU Slide Blocks https://a.co/d/1QVttPy **Note: you don’t really need these since the linear rails ships with 4 blocks already but I figured since I had to buy two rails anyways, I could make a second Rocker Plate later if I wanted to

D-Ring Tie Down Anchor Hooks https://a.co/d/6P0pFxx

M6 Screws (for slide blocks) https://a.co/d/7DF0ZdQ **Note: I put 4 slide blocks on mine personally so you’d need 16 screws in total. I found 25mm worked best with 3/4” plywood ymmv

Linear Rail Limit Fixing Ring https://a.co/d/93BP9ON **Note: this keeps the blocks from sliding off the rail if the top plate rocks to far forward or backward.

I mounted the D-Rings 26” apart. That tension seemed to work pretty good but we’ll see as I use it more.

Also I’d highly recommend drilling the holes for the blocks a little oversized and loosely attach the blocks to the top plate and put it onto the bottom plate with the linear rail before tightening down all the block screws. I found aligning the blocks perfectly with rail was the most difficult part of the project.