...class 121 and 122 driveshafts worm drives and spare motors, i just motorised a dummy for around £20!!!!

You need two farish 12 tooth gears and a larger diameter 20 tooth gear as well as three splines for each bogey....

Or if you have a powered unit as well you can swap one geared bogey with a dummy bogey, runs fine with only one powered bogey, on test pulled four farish coaches too with only one drive bogey.

That is all

Very useful if you are considering the class 128 conversion!