I'm pretty sure the answer to this is "you can't" but just in case I'm wrong can anyone tell me if its possible to remove the head on a tripod where it was purchased as one set.
The tripod I have is the Manfrotto 7302YB and it came with a nice ball head on it. Generally speakng it serves all my needs (especially since I discovered I can reverse the center column) but I wouldn't mind changing the head to a geared head without having to buy another tripod.

