This handy extruder visualizer also holds your nozzles. I designed single, double and triple nozzle version, but the f3d files are included if you need ones with more holders.

Just print and press in a 6mm magnet. The nozzles then can be screwed in by hand.

Because the nozzles are a bit heavy, all the holes need to be filled on the visualizer in order for it to be balanced. Since I only had 2 spare nozzles, I only tested the single and double version.