I mean it will fit geometrically, because new TAC1 share all scaling with current rework and retail model. Old variants of TAC1 will fit to NuChronos on the same principle.
I work on FSU stuff mostly on behalf of Inferno. EA use recolored variant of Chronos with three turrets as EAFr Belus replacement. Also it was requested by Mjn, as Chronos appears frequently in BtA.
In the end I always try to pick whatever is most used by multiple projects [if possible] for mutual benefit or if there is already existing mesh that requires completion. Inferno has priority, but Zephyrus or Fenris does not appear in Inf so it's not always the case.