Now if only there was an eraser tool to rub out bits that don't work properly. I've yet to get a loop to work.
from the way it seems to work, i wouldn't think an eraser would be a viable solution, too much trouble... it would be more of a delete... it lays down lines as you draw them and once they are drawn they become individual lines so it wouldn't be possible to delete only half or bits of that line. It would have to be all of that line, or none of it.