Focuser Board

I am ready to work on my focuser board and was wondering what some people have used. Both the material and thickness.

I have some 3/16" - 1/4" subflooring (nice outside finish, nice grain patterns), but was thinking it might be too flimsy for the focuser (Moonlite CR1). I also have 1/2" Baltic Birch. I want to keep the cage weight down, if possible.

Thanks,

Tim H.

I would use the 1/2 Baltic Birch. You want it to be stable with heavy EPs and focusers and you want it to not warp later.
Floyd