The co-ax won't do it. I have a Lama2, and can fly that nose in all day, but I still don't dare try it with my TREX. The co-ax will teach you basic orientation, but not enough to handle a CP heli nose in.

My suggestion would be to get a small fixed pitch heli with tail rotor if you're only interested in using it for a nose in trainer. They're cheap, rugged, and most crashes will only cost a few $$ to fix.... Also, they are VERY difficult to fly, which is good. Once you master nose in with that thing, your .30 will feel like it flies itself

Something like the falcon 40 or Honey Bee would be good choices...