gap power x1 x2 etch
1.20 275 -1 -1 775 
1.60 275 1 -1 670 
1.20 325 -1 1 890 
1.60 325 1 1 730 
1.40 300 0 0 745
1.40 300 0 0 760 
1.40 300 0 0 780 
1.40 300 0 0 720