... it had done good number of miles and so wasn't in the first flush of youth! I've yet to build a tender loco of this type of drive so I'll be interested to hear how you get on. Incidentally I bought one of Chris Gibbons High Level no reduction gearboxes a few years ago with thought of doing something like you're doing but with a Great Western 28xx. Been track building ever since, so no progress!. Kind regards Andrew Hi Andrew, Here's an earlier version (from about 25 years ago!) 2983_112251_060000000.jpg This one has the more conventional worm drive the the center axle. I think that's a 40:1 Romford which is a bit too much reduction for that motor. The top speed is too low but it is relentless and quite quiet too. The drive shaft consists of two concentric hexagonal brass tubes that can slide to accommodate changes in length. The "universal joints" are actually pieces of thin-wall silicone model aircraft fuel line. Crude, but effective. The tender chassis is a solid lump of square brass ...