Yeah, I can't wait til the box is fully cured so that I can fill it. I even put some patches in to see if I can scratch them off when it's full of water for a while. That seems to be some people's fears with this stuff, but I don't plan on having any underwater seems anyway so it's just for Sh##s and giggles. This stuff is strong as all get out. no way those two boards are comming appart without seperating the ply it'self. I'm not sure weather it's bonded to the acryllic or not, but I know that it won't come off lol. Gives me high hopes for this stuff. I think that you could actually apply this stuff directly to the acryllic in the frame, but it would probably need to be an enclosed frame which is kind of what I'm leaning towards. Sounds scary, but seems like it would work really well right now. We'll see though. Stuff definitely sticks to it way better than silicone.