I knew from previous tests that these retract distances wouldn't be good, but I ran them anyway: 0.3mm, 0.6mm, 0.9mm, 1.2mm. My next set was 1.5mm, 1.8mm, 2.1mm, 2.4mm. Oh, sorry. Didn't mean you'd have to use those values, they were in a good range to go from "needs more" to "too mu...