I’m ALMOST happy with my dual extrusion settings. One big problem though, my ooze guard is over-extruding.
What I’ve done so far: lower temps, tweak the tool change extra length setting in Slic3r to -3 & remove Z-lift. Retraction speed at 10.
Anyone got tips?
Edit: I’m guessing the extra extrusion is from plastic falling down the barrel after tool change retraction. -3 removed the initial issue of excess plastic extruded at tool change restart, but maybe I should go higher?
Ooze guard generally helps. Can you post more of your settings to figure out why the guard is so big?
Unintuitively I found that sometimes more retraction has the opposite effect, try lowering it. 1mm is good as I recall. (less is more 
what am i looking at?
The start of a dual extrusion print. I think it’s the heart monster or something. His ooze guard is that thing around it which more like a weld than a print
This is a bug in cura where it seems to think it’s appropriate to extrude one perimeter with one nozzle directly onto the the perimeter drawn with the first nozzle. With no offset etc.
@Sanjay_Mortimer1 this was actually in slic3r from ooze within the barrel during the tool change cool down. I mostly remedied the situation by lower temps again and changed extra length to be different between the primed nozzle making the skirt and the secondary nozzle (which does not prime.)
This was all done because I can’t find much control of the ooze gaurd. I had a suspicion that my exaggeration of layer 1 extrusion width (200%) could be repeating throughout every layer of the skirt, but instead I focused on excess extrusion after tool change.
If I could control the tall skirt, I probably could have fixed this issue sooner. 
