Good evening.
I've started to dip my toes in the waters of kit building with, amongst others, an old Cotswold 00 GWR 2021 Pannier tank. It's got the solid brass milled chassis, and a gearwheel. The instructions recommend and X04 or Romford Bulldog. Has anybody fitted a more upto date drive system to the milled chassis and if so, were there any difficulties?
Any observations gratefully received.