Ever search this thread for shooting boards? Ample and plenty of threads about it. Too many for the time I have.

My questions-
What materials should I use for my SB? Ply or something else? Would I want something specific for the plane's glide path? Maybe chop up a plastic cutting board? Or MDF?

Anyone know of a low cost shooting board? Sure I'd love a Vogt bug that's out of the picture. And given the hack nature of my skills, the wrong tool for the job at this time.
Isn't there a low cost variant? Ample Google time hasn't located anything.

Thanks Everyone.
-PD