Smantecon, Welcome to the Grumble.
In my day we used to kind of paddle like heck and then when you feel the wave surging and catching your board, you kind of push up with your arms as you sort of hop your legs underneath . . . . but then that was when board were boards and n.... oh never mind.....
Mounting..... No FACTS..... I would get the OK from the customer to port some 3/4" holes in the back then epoxy lag nuts into the foam of the board. Then you can mount with some 1/2" bolts through the backing board (I'd use 1/2" baltic birch for a short board, 3/4" for my old 11-4).
Glue the backer to the strainer and your go to go.
I miss the crab sandwiches at the Pacific Cafe....
The art was fun too.
baer