The rules are the same as any IEND, devolve the number by 1 and increase the effort of the project! You have to make the ND look and feel like Sviger 1.0, a NROS released in 1981 and minor versions continuing to 1983 with 1.5 Release 2.
i know this was lazily copied from IENE Sviger 1.0 but whatever i got the idea done
