here is my latest mount not quite finished yet, its set up for OS120 4strokes now.

5/8 ply screwed and glued with tite bond III wood glue I will clear coat it with oil based polyurathane, I also plan on making a adjustable tank mount, for various sized engines, behind the firewall.

it mesures 14"x24", ialso used a tatone aluminum mount for the 120