The replacement 3D printed muffs and gears proved to be out of gauge
for OO at 14.7 mm rather than 14.4 mm so I revered to the replacement Bachmann
set I ordered 3 sets of wheel spacers and 3 intermediate gears for a shade
under £10.
The
first loco wheel set was finished this morning and the chassis chipped as I type
its running in on the rolling road.