The Link will offer very valuable information, this is the best place to start to draw from to start to select a shortlist of Materials.
For the record, MU 25 when used on a Plinth for a DD TT and the experiences being had, were comparing MU25 to alternative wood designs, did not show MU 25 as being 'much' improved over Marine Plywood. MU 25 as a engineered wood design is the better choice in place of Marine Plywood, but falls way short when compared against some of the other available engineered wood designs.