Make sure you have your fab's clearances entered in, I had PCBs come shorted because my clearances were smaller than what the fab could deliver. 2mm sounds too

Make sure you have your fab's clearances entered in, I had PCBs come shorted because my clearances were smaller than what the fab could deliver. 2mm sounds too narrow for 8A unless your length will be small, my calculator says 5mm+. Other than that, it's pretty foolproof, so enjoy the process!