RE: CA v.s. Nylon hinges
the dubro ones are not too bad at all, as well as the CA hinges that come with the kit.
I do realize you didn't build it but most ARF's come with CA hinges so if you have some of them as extras then they are OK to use.
another option is to use Robart hinge points there the ones I am using on my TF P-47 they are strong and when properly installed there pretty much bullet proof.
Bruce made a suggestion that you should go with if you chose the Dubro type.
pin them in place when you do this there not likely to come out ever, if you still have the Dubro's that came with the model and there loose and seem to be worn out then replace them for sure.
if there OK looking then RE-glue them in with some epoxy and pin em in place,when you do put some petrolium jelly at the hinge point so the epoxy doesn't glue them stiff,if you didn't already know that.