gunrunnerjohn posted:I think what I'm going to need is weatherstripping. The beams on the Mianne benchwork are only 3/4" wide, so what I am looking at is the one sided sticky weatherstripping rolls. I'll stick it to the benchwork beams and then just lay the plywood on top of it. I just want it to keep the plywood from rattling against the beams.
That's probably a pretty good idea. I didn't think of weather strip, but I did have a couple of places where the top had a very small gap between it and the Mianne frame. This was in places where there were no legs and I only had enough brackets to fasten to the legs, so I ordered some extra brackets and screws from Tim and all was well. My sandply probably wasn't as flat/level as your Baltic birch either, but still the extra brackets may provide added stability and cut down on any extra vibrations.
