I have a solid worktable ~ 72 x 30 inches. At 30 inches height, it is just too low to serve as more than a place for tools and stuff I need for the adjacent bench/vise. I'd like to raise it 6 inches in order to use it for planing/ scraping surfaces or for assembly of the small pieces I make. I can use 2x6 lumber, 3 or 4 across the short dimension of 3/4 MDF to raise the surface. What other methods should I consider?