>>10723477Color separation is not 100% ideal for both 1/144 and non-scale kits, seam welding is also required for both (although Koto seams are really tight, sometimes near invisible, which is not a good thing if you need to disassemble later).
While modding is not strictly required, all of the Koto MuvLuv kits can benefit from it (as they are sometimes not quite on model and painting can be tricky unless you re-engineer some of the joints).