@Martin It’s a good point to go from.
See a preview of your tramlines, but I think it must be based from the boundary/reference AB line. Just enter the spray width and voila you have your tramlines preview “thing”.
And that’s the way the cookie crumbles 
Measured from first pass? Of from boundary/reference line in meters
Mine measures from the reference line. Based on start then skip. In the first picture start on is 0 skip is 3.
In the image below it is start -1 then skip 4.
Only thing it turns off if you are riding the tram line. That could come or go. Just a matter of order of draw… You would want to draw this first then overwrite with the abLine.
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