Hash oil is about dissolving too. Correct me if I'm wrong, but the best hash oil is clear, because the only chemical in it is THC and the other cannibinoids, and they have no pigment. The deeper colored your hash oil, the more pigments from the leaf and other chemicals are included.

Besides, doesn't alcohol extraction hash oil take forever to get rid of the alcohol? I'd rather do it with a butane setup.

Would a pre-bake change the effects of hash oil? Considering you're burning the stuff anyway to turn the THCA to THC... Maybe THCA isn't as readily absorbed by butane as THC.