Mapleshade or Butcher Block Acoustics

A sheet of 19mm 13-ply Baltic Birch in the standard 5’ x 5’ size will cost one less than $100.

@bdp24, can you provide a source for Baltic birch ply?

@tonyptony, in my area (Portland, OR) there is Mr. Plywood, who stock and sell 13-ply Baltic Birch in three different size sheets, including the most common 4 x 8 and 5 x 5. Rockler also sells BB, but you don't want to pay shipping, do you? Just Google search Baltic Birch to find a retailer near you who sells it. If you buy from a good lumber yard (as opposed to Home Depot or Lowes), you can have a sheet cut into shelves or platforms of the size you desire.

Do you use single sheets as platforms or do you double them?
Thanks

I’ve tried Mapleshade and it didn’t work for me. Actually, it was pretty awful. I went ultimately with Terrastone platforms from edensound, and have been very satisfied with the results.