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i am also trying to remove/modify the retract line right before starting the first line being printed. G92 E0 ;Reset ExtruderG1 Z2.0 F3000 ;Move Z Axis upG92 E0G92 E0G1 F1800 E-5 <----Here.;LAYER_COUNT:171;LAYER:0 i have an ender 3 v2 and cannot pick 2 extruders from the drop down in machine settings, as others say. has anyone been able to either modify the json file or find a way to edit the applicable cura nozzle settings in a backdoor manner? search and replace is not a good option, as i modify the retraction and feed rate frequently depending on what im printing... thanks for any help!!

hi! i am having the same issue... my top/bottom lines are printing at a thicker height (taller) than the walls. i noticed this when i switched to a .6 nozzle, and tried to print at higher layers ie .4 i have tried to reduce this by: -matching all speeds -reducing top/bottom flow -this worked a little, but resulted in air gaps when i went below 60% -increased wall flow, in order not to decrease top/bottom flow less than 75% -i went to 140% but the wall lines were just too bloated -temperature higher/lower what seemed to work the best was reducing the layer heights down to .2 i am still able to print at .6 wide to save a little time seems as if the top/bottom is still thicker and does scratch, but is not as bad as when the initial layer is .4 you can set the infill layer thickness independently, but can you set the top/bottom height and/or perimeter wall height independent? i will try to set up all layers as infill and adjust the height to see if it has any effect... would be great to have some other options to try to match all line heights, i would like to try .8 nozzles next!