Hi Bob, I trust all is well.Sean, you could try Bafangs and Aikemas, Bosch in Raleighs and Torque in Wisper and Juicy at our workshop in New Mills (SK12 2PY Tuesdays to Saturdays 0845 0042 330).
We can also try to make the whole process as easy as we can for you and show you all the differences and also let you try them all on local hills.
You'd be very welcome to come and try.
Do you have the new Mark 2 Wisper Torques available to show and test?
All the best, David