My latest conversion of a RTR loco is Bachmann Compound 4P 41157 which I have renumbered 41140 as I have a photo of it on shed.
Conversion follows my now standard method using Alan Gibson wheels with Markits 10BA crankpins, reusing the Bachmann motion.
The tender has a Dave Franks chassis but this time I had to leave off the water pickup gear in order to add extra pickups on the two rear axles of the tender. I'm pleased with the conversion.
Here is a video of 41140 on a Glouceste