Is there any chance the dual extrusion wizard/prime pillar could be updated to support more extruders? Currently when trying to print with 3 colors (3in1 mixing hotend), after setting up all 3 processes, if prime pillar is enabled, it will only prime up to 2 colors, if a layer has 3 colors, it only primes one of them.
This is a fantastic idea. I've seen that, at least with the Prusa MMU, the purge block idea is pretty inefficient even if it's more adaptable than the S3D prime pillar. I thought their support team had helped others in the past with a script that can be run to optimize with the MMU. Is the MMU the machine you're specifically wanting better priming with?