I have 2 sheets mdf on top of the cross members, no vacuum table. I surface the top but when I screw down (sheet goods) in this case the top deflects. what would an solution be? I was thinking building 1inch plywood torsion box inserts in-between the crossmembers bolted in and a top and bottom 1 inch ply bolted on as a base. I could still add a vacuum after if I found the funds.
Like where is the flex? I noticed it happening on the sides where there was no support. I talk about how I solved that in this video at this point: https://youtu.be/wUP99Vdxp3E?si=7f_goSOiAHvm55n1&t=560