Hi oddjones
Regarding the motor, the rpm & controller current limit will determine the torque level (for hills/acceleration) & top speed: basically lower rpm = more torque, lower top speed & vice versa for higher rpm. Higher current limit = more power & torque.
Torq1 motor is around 260rpm I think (measured under load, around 300rpm or more no-load rpm) but in 700c wheels & with a 36V 22A max (delimited)power ~800W gross around 600W net, top speed motor only 20-22mph but only rated for hills up to 10% but a bit more with lots of pedalpower or low bodyweight
.
For better hill climbing either a lower rpm motor or more power, but the latter makes it more of a high consumption, low range motorbike!
Hope you find that useful & let us know how you get on
Stuart.