I wanted to improve the realism of LoboCNC's fabulous knife switch by printing the "conductive" parts in copper-colored PLA and the handle parts in wood PLA, so I separated the pieces and added dovetail joints. I also closed off the opening in the nubbin so that the lame ivory toggle of the actual switch is not visible (not shown in the photo). I also made the handle fully round, since it prints vertically and support is not an issue. 

For the baseplate I set a pause in the Z-Suite slicer at 39%, just above the surface of the plate. I printed the bottom of the plate in MeltInk silver PLA, then at the pause switched to Octave "Copper-Infused" PLA. The switchbars are printed in Octave copper-infused PLA; the handle, crosspiece, and nubbin in FormFutura EasyWood™ Ebony (the nubbin in the photo is 3dom "Wound Up" coffee-based filament, but I ultimately changed it to ebony wood). The dovetails fit perfectly for me so that glue is not required, but a drop of superglue would make it even stronger.

Print Settings

Printer: Zortrax M200

Rafts: Yes

Supports: Yes

Resolution: 190µ

Infill: Light

Notes: A Z-Temp temperature control was used to lower extrusion temp to 215º for the silver and copper parts, and 225º for the EasyWood™. Support angle was set to 45 (light) and 30 (light) respectively, and support was easily removed. The slicer generated no support for the nubbin due to "enable bridging" being ticked.

Dual print fans running at 100% were used for all prints and no bed heat.