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Dave Jones Models (DJM) / Hattons OO GWR Class 14XX 0-4-2T

Kit: Zimo MX648, YouChoos SugarCube7, crew figures

Excellent model from DJM, nice and heavy, good detailing, and very smooth runner. However, not a lot of space!

We tried MX649N direct plugin and MX648F 6pin-plug-on-harness decoders, but none of them would go into the tight boiler. There is plenty of length inside, but any of these simple options just wouldn't go in with all the wiring too, so the solution was to hard-wire...

Given how tight it was, we decided to go minimal with wiring, and the plan was to solder the model's 6 wires (2x pickup, 2x motor, 2x speaker) direct to the decoder, thus we need to remove ALL wires from the decoder to begin with. Probably could have got away with short joins, but this approach certainly makes it simple to squeeze into the boiler at the end...

All 3 sets of wires in the model are RED+BLACK (argh!), so methodical transfer of the wires from the unwanted 6pin socket board to the decoder is essential. We move the pickups first...

Now the motor wires...

Finally the speaker wires...

Protect the exposed end of the decoder and gently feed the decoder into the boiler. There is plenty of depth here, so push right in, and tuck wires in at the front, then pop on the magnetic boiler door.

Now, for the speaker... DJM have provided a slightly odd mount for a SugarCube speaker without any enclosure, but frankly, that's not going to work terribly well - SugarCubes really need a proper seal, so we'll remove the black bit of plastic which serves as this mount, and place a proper SugarCube7 in the bunker - no modification required to anything - just removal of the black plastic muount.

Take off the coal...

Undo the 2 screws that hold on the cab back and roof...

Remove the handrail that joins onto the roof on one side...

Slide up the cab (careful of the whistles)...

Slide up the cab back interior (with the nice detail) also the black plastic speaker mount, and you'll find that the cab doors fall out at this point too...

Wire up the SugarCube7...

Add some crew figures while we've got the cab open...

Now the tricky bit... lighting attached the speaker to the back of the bunker (some double-sided tape is fine for this), then slide the detailed cab back panel back down into place, ensuring to put the doors back into position as it goes down (this is fiddly, so be patient and steady!), then the cab roof can be slid back into place to hold all this down, adding the pair of screws back into the bunker again to secure it all.

Tuck the excess speaker wire into the bunker - I used a blob of BlackTack to keep it all down

Add the coal load back in, and you're done!

All in all, a little bit fiddly to do, but not too difficult. You need to have reasonable soldering skills to use the approach of soldering the model's wires direct to the decoder, but otherwise, no major headaches!

Disclaimer

Please note that these guides are provided as useful resources for you, as-is. YouChoos cannot be held responsible for errors in the information, or for any damage caused to your models or equipment if you choose to follow any of the steps detailed here.