Duane:
Unfortunately, you misunderstood my response to Fabio and do not yet appreciate the capabilities of the Totalizer in overshoot correction. If you like the Jones in the latter regard, you will be ecstatic over the Totalizer.
If an unalert and thoughtless measurer with an electronic counter were to stop his bicycle and roll his wheel back without realizing what he had done, with bad luck the wheel might go through zero and a spurious count might be recorded. In a similar situation with the Jones there would be no problem, because the Jones goes into reverse automatically. It is this useful feature in the Jones that I guessed Fabio was calling for in the Totalizer.(I assumed he knew about the superior overshoot correction of the Totalizer.)
Many measurers like to correct for overshoot with the Jones by simply backing up the bicycle. (Note though this is disapprove of in the official manual.) However this is only practical for about 25 feet. If say the measurer has taken a wrong turning, he may be say 2500 feet off course. In the latter case the bicycle must be ridden back and to salvage the ride, additional readings and calculations must be done. The record is not clean.
Like the Jones, the Totalizer can be put in reverse and the bicycle backed up with no readings or calculations required. More importantly though and unlike the Jones, it can be ridden back in reverse mode indefinitely to any visually selected point. No readings or calculations are necessary and it is as if the overshoot or the turn off-course never happened. The measurer does not have to bother the certifier about it.