I hear ya all on the rocker table, and I kinda knew that was always gonna be a bit of an unknown quantity.
I must admit early doubts surfaced when I took that first pic of the board just after I cut out the planshape, and sat it flat on the concrete. I suspected there and then I may have over-rockered it, but I think the bigger problem was that I bent in a continuous rocker with no discernible planing area. I knew this was a risk from the outset, but I hoped I could fine tune it by taking meat off the thicker bottom skin. The problem was that the high point was
too much to take off ( e.g. > 5mm ) and worse, I attempted to fix it with a single concave. I think even if I managed to plane out enough through the middle there still would have been too much curve in the rails. I was unsure how much the board would "spring back" after I took the weight off it, and I definitely overestimated that. But surely this effects a rocker bed as well if you exactly copy the rocker of an existing board? I'd expect it to come off the bed slightly flatter than the curve in the bed itself... but maybe I am missing something. :?
The thing is I have made three conventional EPS blanks using continuous curve rocker, with a 3-ply stringer. All of those boards went really well ( even if they looked awful ), including the infamous
Epoxy Carbo Rail Flyer. That board had
at least as much rocker as the compsand... and I botched the FCS plugs... and it was two inches longer... yet it never suffered the horrible drag I felt from this latest failure. If I could see a really big difference I could say to myself "ahhh.. you really fucked up there, dug", but the thing is... I can't see anything that looks disastrous. And that makes heading back into the shed a bit daunting, to be honest.
Right now, I have decided to try something desperate. I've turned the bitch upside down, sat it on foam blocks, and positioned 20kg of weight just aft of the mid point. I measured the height above the floor, and I'll measure it again in a few days. In theory, if I leave it weighted long enough, it will at least take some of the rocker out.
The more extreme approach is to get violent with the planer, and take out a shitload more rocker. I'd also destroy the concave and revert it to a flat bottom. You can imagine what's involved here: sanding off the glass and bottom skin ... followed by re-skinning, re-glassing, and trying to make it not look like an epic train wreck. It would take hours, it would cock up the foil completely, and would still carry a high risk of ending in spectacular failure.
I'll measure it again on the weekend and see if it's helped. If not, I might try parking my wife's car on it for a few days.