I wanted to get some foil wedges so went to my local auto shop here in NSW Australia. The shop was Super Cheap Autos.
I thought I was going to find some in a packet. But when I checked I found the ones in the packet weren't wedges. But hanging in a rack were some single ones at around $3 max. They aren't the full size of the foil mount but will do for now.
They are 2mm at thick end. & just about full width from bolt to bolt so couldn't drill holes for bolts to fit through. But this was quicker for me to install between foil mount & board. So no problem trying to locate bolts through holes. Yay!
All I had to do was a few measurements & use large scissors to cut out the outside edges so the wedge would fit between the bolts & stop at the outside perimeter of the mount. The pics will show what I mean.
And the 6mm thickness of the 3 wedges is just about right for foil mast to be perpendicular to centre of bottom of board between Neilpryde foil & JP 6ft 8" foil board. I am hoping it to be less on trial rides.