Hi,
From my expiriance roboteers can be any age it's defiantly not just young people especially in the heavier weight categories.
Also as fair as I'm aware there are no raptor fights in the uk at the moment and no plans do have any, you could go over the germany or Belgium where they are more popular. I imagine you could put it in with feather weights if you wanted to, one of my robots 'Colin' only weighed about 6kg.
Hope that's helpful