(CisULnar in the title, don't think it has anything to do with your arms.....)How long is the max free flying time of Cynus now? On the order of weeks? What modifications will be required fro long-term free flying with periodic visits? ECLSS? MMOD?
It'd probably be really prohibitive to do, but it really would be nice if there was a Cygnus variant (especially for this sort of application) that was the size of a full diameter ISS module. We've seen a longer Cygnus... can they get fatter?