 Interesting fact is that the program could make a copy of itself, BUT could not make a copy of the copy because the sync length of the original was shorter than the copy made and the loader checked for this length and the copy would have a much longer sync.V3 was later released to PD by the author.NIBtools is a modern (circa 2006) open source software that performs the same function, intended mainly for archiving data from old floppies that may be copyright-protected or damaged.