@jaros: I'm using a brand of polycarbonate called Palram that's available locally. Lexan is another brand of polycarbonate.
@SupaEZ: I'm using a nylock nut on the bolt instead of loctite. My previous board failure was due to placing too much stress on a recessed hole in the acrylic. I believe the recessing caused the notching which allowed the crack to propagate. I'm hoping the bolt head I'm using now will place the stress on the outside surface of the sheet, and not on the sides of the hole. Time will tell.
Anyway, I mounted some 5"x0.7" fins on the board (with VHB tape
) and went for a session at the cable park again. The board feels a lot more locked in, as I'd hoped.
With every session I'm pushing a bit harder and so far I'm enjoying the board more each time.
The rail edge is currently a fairly sharp 90 deg, and quite unforgiving. I had two face plants today when I caught the edge on a transition.
I'm going to sand down the edge to be a bit rounder in the middle of the board.
The nice thing is I can pretty much sand any edge profile I want as it is a solid piece of material.
Here's a somewhat boring video of the new board in action.
https://vimeo.com/123418445