Hi there. Just joined.

Finally got my Ender-3 Pro to print without problems of adhesion, nozzle height, bed leveling and all the rest of the hoops you need to jump through.

On the basis of 'Run before you walk, fly before you run' I'm experimenting with multi-colour pritning with a single nozzle. Quite a few YouTube vids on the subject but they all chose the simplest prints.

Some things I have already worked out:
You need a single-layer thin 'register' box around each colour to make sure that Cura accurately places each file in exactly the right position as different colours will have different boundaries and they won't line up.
There's a limit to how small you can make any extrusion. I'm trying to get lines below 0.2mm wide with a 0.4mm nozzle so that may be the limit.
The YouTube videos all show the print face-down on the bed. Not ideal.
Loads of filaments are too transparent. At least two layers of 0.2mm needed for proper colour rendition.

I'd be really interested in anybody else playing in this particular sand--box. Maybe we can 'paint' pictures?

Best,

Chris