Actually no, When I layed the steel on the torsion box it laid down smooth like an Army sheet.

I built the Box to exactly 3' x 8' and had the steel cut to those dimensions.

After I sanded the steel smooth, I then banded the box with 1 x 6 Oak. I left the oak a little proud of the steel, then routered it with a flush trim bit w/bearing to make it all level. The oak has the steel locked into place so that it won't move.

This way if I ever want to switch to glass I can pull the steel out with a large magnet and drop a piece of glass in.

Jeff