by Bflat on Thu Feb 20, 2014 3:45 pm
It might be a dumb question, but do you remember how the board felt when you dropped it in initially? Did it go in without rubbing? I mean it seems unlikely that glassed plywood would actually warp. It seems more likely that a bend could be overlooked or even accidentally introduced while laminating the two pieces (like Herb mentioned in his post).
Virtually all plywood has some curve to it. Careful lamination can often correct that. I laminated mine on the flattest place I have, my table saw. I did a dry run with clamps and checked for flatness with straight edge across many angles looking for cupping and bowing. I cut 2 inch pink foam board insulation to the shape of the centerboard minus a couple inches in each direction to leave room for the spring clamps. I set that foam cut-out on the table saw, then set the ply pieces on top of that, placed a 2nd identical foam board cut-out on top of that, followed by a bunch of bricks and clamped all around the perimeter. Even then, there was probably some luck involved. The wood was pretty flat to begin with as I recall (I'm building the kit).
I guess if I was you, I'd try to take some (little) comfort in the knowledge that if the board is the problem (not debris), then at least you can rectify it with another centerboard. If you've already determined that debris isn't the cause, then it would seem that it must be a bent or swollen board. There just aren't that many variables, and, "gravity isn't just a good idea, it's the law."
For what it's worth,
Bob
Last edited by
Bflat on Thu Feb 20, 2014 6:40 pm, edited 4 times in total.