Thanks for the reply.
I hope no one thinks I was being lazy by asking this question and not researching etc. it's just that there are so many people who say yes run tubeless tyres on the rostyles, it's ok, and others who swear you have an inner tube. If you don't have the inner tube, small pebbles might make the tyre wall come away from the rim, some say. Tubeless tyres are not supposed to have inner tubes inside, others say. I mean, are tyres requiring tubes still made? This was my conumdrum!
So yes I would like rostyles eventually on my RRC, but, I'll wait for more advice in the meantime.