Straightening the keel
To straighten the keel, I'm trying a method I've read about: I've placed the keel, which is made of high-grade plywood, into a ziplock bag with a damp sponge.
This should loosen up the glue which binds ply to ply just enough for the keel to straighten out, assisted by a pair of flat surfaces and a bit of weight.
It might take a few days, though.