After an unplanned break Thanks for the info, looks like stepper motor choice is a bit more complicated than I thought :(.

Been looking in EBay hoping for a bargain, but a bit scared now to spend around £100 on quite possibly the wrong motors.

Thanks for the info and link, time for some reading I think. Fortunately I'm not completely lost in the world of Volts, Amps, Henries, - I used to work in electronic engineering, just have to remember all the bits ;)

Thanks again