Stop ... Think!Before proceeding any further with assembly, it is worth stopping to consider just how the boiler unit is to be fitted to the running plate and where the wiring is to be routed.
Points to consider are : Where holes are needed for wiring to pass from firebox area to bunker space (some electrical items will need to be in the bunker); how to constrain the wiring so it doesn't interfere with moving parts and, finally, how to fix the boiler unit to the running plate without risking damage to previously soldered parts.
To retain wiring in the boiler/smokebox area, I folded up a few brass brackets/clips and soldered them as shown in photo below. These will guide the wiring from the cell pack, motor and sound speaker down between the frames and (where necessary) under the cab floor to the bunker.
A further clip can be retained by the head of the 6BA screw which runs through the frame spacer beneath the bunker (attaching the chassis to the running plate) and this can guide wiring up through a hole in the running plate and into the bunker.

Where individual electronic components are fitted will depend upon the system you are employing and space constraints. If you are locating items inside the tanks, it may be worth soldering cable clips in appropriate positions.
It had been my original intention to solder the boiler unit to the running plate but, having considered the risk to existing soldered joints (and difficulty of gaining access for soldering iron to make concealed seams) decided to bolt the two together. To achieve this, a 6BA tapped brass plate was attached to the underside of the smokebox and a hole drilled in the running plate to accept the bolt. The cab front has a brass angle fitted on the lower edge, facing into the cab and drilled/tapped 6BA (again a corresponding hole drilled in the running plate).
If you wish to retain the ability to separate the boiler from the running plate and are building a "full cab" loco (this doesn't apply to open cabs) then you will have to arrange the cab roof to be removeable (mine is soldered on, since I don't foresee any reason to remove the boiler).
Before fitting the roof to a full cab version, remember to fit and paint the boiler backhead and other cab fittings!

DetailingReinforcing angles along bottom of tanks and bunker : These are not provided for in the kit but are represented on my model by narrow lengths of brass strip.
Ejector : If you are modelling a vacuum-fitted loco, then you will have to fabricate the ejector. It sits on the right hand side and the pipework replaces the handrail which runs from tank front to smokebox. I soldered mine up from bits of brass and copper wire and tube....a fiddly job but worth the effort.
Injectors (Clack Valves) : As I mentioned previously, the supplied castings have the pipework cranked inwards instead of outwards. I cut away the cast pipework from the valves and drilled the top and bottom parts to accept a stub of 60thou brass wire. I then formed new pipework from copper tube and this was fitted over the wire stubs and the whole thing (not forgetting to insert the cast flanges which fit between the valve and boiler) was “Araldited” in position, taking care that all was square and vertical.


