if i upgrade my novus to nexus can i still change the stats with a sphere scroll?

[papichulo123]

and the weapon remains at lvl 115 nexus?

[Hyunckel]

Yes. You can even change stats with a sphere scroll of a zodiak ilv125 relic. Alos, you change stats one point by one point. Each of those changements costs one Alexandrite though (and the appropriate materia, % chance of melding doesn't change)