available cast whitemetal parts (in fact they were intended for a New South Wales 422 class diesel).

The stiffener plate which connects the bottom step to the web under the lifting point was made from 0.15mm brass. Soldering these tiny parts became quite a challenge, but I got acceptable results by first applying a small dab of solder with an iron, then hitting it with a very brief blast from a small gas torch to run the solder into a neat fillet without providing sufficient heat to unsolder the surroundings.

It was important to ensure all the soldering was completed before moving on to adding plastic components.

Axleboxes and springs
Building the axleboxes from scratch seemed like a lot of work for something that is hidden behind the sandboxes, but I wanted them to be reasonably correct, and to align with the wheel centres. Looking around for any suitable commercial items led me to the bogie frames from a second-hand Lima wagon. The axlebox and horn guide was not exactly the same as those of the NDM6, but it was similar.

I removed the axlebox and springs from the bogie frame by first cutting off the section of frame that carried them, then sanding away the back of the frame until only about 0.3mm thickness remained. Then the axlebox and spring was removed as a single piece by carefully cutting around it with a craft knife (with a fresh blade). This was then fastened to the frame with superglue. I hesitated for some time before

fitting them, as the lack of visibility of the springs in photos, plus their absence on some drawings, made me wonder if the locos did in fact have leaf springs. However, enquiries to other modellers, and some searching on the internet, confirmed the arrangement of the leaf springs.

Detailing
The lamp units that are located at the front and rear, centred at footplate level, were modelled from a short piece of brass tube soldered to a backing plate, and then soldered in position on the footplate, which, as noted earlier, is a separate unit from the chassis. The two marker lamps at each end were simply a cube of polystyrene, drilled with a hole to represent the lens, and mounted with superglue. (The Worsley kit provides the mounting plates for these on the footplate, but the lamps must be provided by the builder.)

Several other details were added to the chassis using styrene or wire.

A styrene cab floor and crew seat was added to the footplate, to facilitate the fitting of crew figures later. Also the body kit does not include the filler caps for the front sandbox, so these were added to the footplate using a small circle of thin styrene. Presumably on the prototype the filler for the rear sandbox is accessible within the casing that extends forward from the cab.

The speedometer cable from the right-hand rear axlebox was formed from 0.15mm brass wire. Photos of the locos indicate that there is a small cylinder located inboard from