On Jul 26, 9:07 pm, "Eigenvector" wrote:
A long while back I posted a question about repairing a treadmill deck.
Most of the responses were helpful pointing me in the direction of oak as
the decking material of choice.

The deck is 27"x48"x11/16th

I would try Baltic Birch plywood. This is not the junk plywood you
get from Home depot, it is all birch plys throughout the thickness.
You can get it in 5/8" (actually a metric size close to 5/8") and shim
it at the 6 support points.