Haven't flown the X but I have the CAP 580 .40 size from great planes. I run a 61fx in it and it is a great flying plane! It isn't the most capable 3D plane but I have 3D throws set in and it is ok with it. You can hover and harrier and some basic things like that. The plane is just pretty small and it can be hard to hover such a small plane I thinkg. No tip stall problems though like CAP's are famous for. That CAP X looks pretty sweet tho!