It would look fine except that a WoR number 2 key would look strange with a RoW base set, the other keys not so much. If you can give me a quote on the potential costs for my order (1 x RoW base kit, 1 x WoR modifiers, ISO kit), I can weigh up my options and let you know from there (Not necessarily an 'official' invoice, just a ballpark figure.