Dave if you saved that original AB line it will be there for years,the only problem is you could have some drift over time. If you made corrections for drift that next spring or next year you should be able to follow the strip way better than you could manually driving the tractor. Drift does not change that much over time in most cases, so all you would need to do is watch your planter openers and if they were getting off course simply make the correction needed with shift track.

You could strip till in-between the old rows providing you saved the coordinates and shifted over 15" from the old row,or what ever it took to be centered.