the whine might be due to incorrect tension on the belt. what steps did you follow to tension?

also, you mentioned being able to pull two keys out at the crank. obviously you pulled off the pulley, but did you pull the sprocket as well? each has a key. each cam gear has a key as well, though those have a curve in the shape.

as for the belt working off the gears, do you have the plate in place between the sprocket on the crank, and the crank pulley?