A bit more progress has been made on the GLS30.
After a lot of dithering I finally went for the High Level Kits LoRider to power the loco. This has a 48:1 gear ratio, so should be very controllable at low speeds. The LoRider comes as a nickel silver etch with all the gears and other bits needed to mount it in a 4mm scale diesel. You need to get a Mashima 1420 motor (also available from High Level Kits) and your choice of wheels, although these must use a 2mm axle. I used wheels from Alan Gibson Workshop.
Although the scale size for the GLS30 wheels is 19mm, the largest that can be fitted to the LoRider is 16mm, but this is not a problem as the wheels are largely hidden by the loco's side frames. It does need a little filing off the sides of the motor to ensure that the wheels cannot touch it and short out.
I had to be careful not to damage the brush holders and their connection tags, it would be a bit embarrassing having to send off for a new motor.
You can see where I have added a couple of pieces of 10 thou styrene to make sure that the wheels cannot touch the motor.
The complete unit is below, just waiting for pick-ups and a DCC chip to be added.
It will need some heat shrink adding to the motor connections when I get round to wiring the unit to make sure that the tags cannot touch the wheels and blow the DCC chip.
The screw sticking up at the right hand end is to set the ride height as I have built the unit with a compensated axle. There is the option of building the LoRider as a rigid unit, but for rail pick up the little bit of extra work to add compensation is well worth it. I also chemically blackened the chassis unit after the soldering was complete, but before all the gears were added.
I packed the loco frames up to their ride height on some scrap styrene and placed the LoRider in the middle to see how much of the assembled unit is above the footplate level.
As you can see there is not much in the way of adding full engine and gearbox detail, so I may have to leave the bonnet sides off. The next job is to figure out a fixing for the LoRider.
Excellent service from both High Level Kits and Alan Gibson Workshop, so I will have no hesitation in using them for supplying the drive and wheels for future models. I am not connected with either of them except as a satisfied customer before you ask.