Nathan spent a while longer reading over the options and the information in the various documentation provided through the system's help features until he was sure he understood what the options did and how they worked. He didn't want to leave any of what he was about to do to chance.
While his new body guest was exploring his new home, Nathan went to work. He adjusted Jake so that he was unaware and chose to change reality so that everyone else thought they had always been this way and that it was completely normal. Jake, specifically, would remember the events of the past but that during their playing with the chronivac, he had been curious and wanted to try something kinky and merged and to his surprise, Nathan had allowed it.
After thinking a moment, Nathan adjusted the slider for size a bit higher and made it so Jake's adjustment was 80%. Enough that Jake wouldn't accept everything without convincing but enough that the sly dog could slowly coax his new partner into accepting being his cock. After all he wanted a chance to really experience what it was like with a living cock and maybe slide Jake into a new home from time to time.