Summary

This is a little 3D-printable switcher! It's designed to fit on the motor of an Aristocraft Center-cab switcher, along with having some body-mount Kadee couplers!

Note: This doesn't have handrails, but they should be easy to make with some wire.
Thing you can ignore: Free my models 6f4bded18f10

Print Settings

Printer Brand: 

AnkerMake

Printer:                      

AnkerMake M5

Rafts: 

Doesn't Matter

Supports:                      

Yes

Resolution: 

As high as possible

Infill:                      

Doesn't Matter

Filament: Erone PETG
Black/white                    
                        

Notes:                     

If you have a heat-resistant plastic, USE IT. Motors produce a lot of heat, and the mounting that holds the thing onto the chassis is RIGHT above the motor, so It'll be taking some heat!
 

(And this motor in particular produces a lot of heat! The body has ventilation for airflow, but it's not the greatest)

Post-Printing

Once you print it, (WITH SUPPORTS), remove them and clean it up as best you can. For the parts of the chassis that hold the couplers and motor, (Particularly inside the bracket that holds it on) ensure these are smooth and clean. For the motor, there are some brackets on the side that need removal, (You'll know which ones. They will stop the chassis from sliding on) but some careful sawing should do it. I would recommend assembling the engine, disassembling it, painting it, (& gluing in windows) then reassembling it. Nothing major is held on with glue this way, so it should be fine!

Non-3D-Printed Parts

1 pair of Kadee 830 couplers (Or 930)
Motor Block (Aristocraft Center-Cab Switcher)
Screws (I used the extra screws from the Kadee couplers)
Electrical Tape (Optional, but highly recommended)
Clear or Frosted Plastic (Optional, but highly recommended)
Warm white LEDs (Optional)
Wires (Optional)

Assembly

First, take Kadee 830/930 body mount couplers and assemble them as normal. Preferably, use couplers whose lids firmly snap on! Next, slide the couplers in from the front into the chassis, and screw it in, ONLY FROM THE REAR-MOST SCREW-HOLE. (Otherwise, you'll pierce the floor, ruining the chassis) Once the couplers are installed, carefully place the running board onto the motor. Screw it in place, insuring the arrow on the chassis is pointing forward! On the body, glue clear plastic into the windows and lights if you want, but I would recommend using frosted plastic to hide the lack of interior. If you want to add lights to the engine, wire the lights to the motor now, and use the tape to secure the LEDS into the lights on the body. Carefully tilt the assembly on its side. Align the body with the chassis, and screw it in place from below (If it doesn't make sure everything is facing the right way). Once the body is secure, slot the cab roof into place (You can tape of glue it in place if you want) and you should be done!