I don't know how it's done but I may just have to do it manually if the Mikini doesn't support no drag boring (which I'm not even sure how to implement, like how to do tell the machine where the cutter is oriented?). It certainly ruins the finish on the way up and if you stop the spindle at the bottom and retract the boring bar, it will score a slice in the wall of the bore. Reverse boring probably won't work either as the engagement angle is probably too shallow and will cause serious chatter, that is why I think it is ruining the finish on the way out. The only solutions that I can see are A. Do it manually. B. Do no drag boring. C. Explore different insert geometry that won't chatter on the retract.