OK--got to the lab this weekend---- my default GCODE (Fusion 360) sets retraction at 0.5mm. This seems a bit low from my reading--Based on all the advice here I put it as high as 7mm and a lot of stringing goes away. But it still is there. Honestly I don't mind spending a bit of time with a blade and cleaning up--but it leaves nasty "spots" wherever you cut away plastic.

Maybe try higher retractions (I have a Bowden system). Not sure how much I can control speed between dead passes for short distances--probably will have to look at the GCODE here and maybe make up a few false samples that test this-

Thanks
Fritz