I'm printing PLA in extruder 0 and PVA in extruder 1. I use the PVA exclusively for soluble supports. When I print with a Primer Pillar, it does a great job of alternating the extruders and priming them on the pillar. However, the pillar is taller than it needs to be in many cases as less and less supports are needed as one progresses vertically up the print in many cases. Unfortunately, when there are no more tool (extruder) changes left in the file, it still prints layers all the way to the top. This is less than ideal in many cases.
If "cull top" is selected for the prime pillar; then after the pillar is generated the layers should be counted (N) from top toward bottom until the extruder changes or the bottom is reached. N-1 layers should then be popped off the top deleted.
- example of a prime pillar which could easily be culled.