So quick update. I’ve dropped speed to 40 mm/s & 20 mm/s on walls, increased temp to 205 and run the minimum extrusion distance window from 1, 3, 5 & 10 mm. There is essentially no change except for the location of the error. Running at 80mm/s it was a little more exaggerated than at 40 mm/s especially when I dropped retraction to 0. I have a final test running now with 1 mm^3 in extra prime as I think that’ll address some of the issue but already have compiled the firmware with linear advance enabled as I believe that to be the root of the issue after @forcerouge’s recommendation.
More to come and will post pics before I call it a night.