overextruded solid layers with Extrudr Durapro ABS,

I am only having issues with ABS, PLA, PCTG etc work without such issues. I am having issues with the Extrudr ABS: solid layers get overextruded altough I did calibrate the flow rate to match the extrusion with of single perimeters exactly. Also the dimensions are accurate. I have to lower the top fill flow ratio to 70% to get acceptable results, however I can still see that the underlying layers are still overextruded and bulging out the perimeters. 100% top fill flow ratio on the left 70% top fill flow ratio on the right Extrusion multiplier is at 0,94% Any help is appreciated.