neurot

I don't know at what stage this occurred (I think glue up perhaps), but after laminating the zebrawood/bloodwood wings to the walnut core, the core has warped about .02" in the middle. The back is of the body is buldging and the front of the body is warping inwards. Unfortunately, I already routed the pickup and neck cavities. So how do I go about getting the top flat? Hand plane it down? Thanks for any help.