Removing and replacing rear hubs

The Kymco TorqueMeister, or one of its knock-offs like the Mr Torque tool (available from VW Heritage) is your saviour. You will need the extra piece for removing rear hubs which may not be included with all versions - check before buying. You will also need longer than normal wheel bolts to bolt it to your hub - at least the standard 5 stud bolts are too short.
This tool bolts to the hub and multiplies the torque that you apply with an ordinary 3/8" breaker bar (or a torque wrench if you're replacing the hub) by something like a factor of 9. This turns a very hard job into a very easy one.