Hi Dan - from your description it certainly sounds like thrust adjustments are needed.  My Spitfire started out the same way - great glide, first powered flight with just a hundred turns or so stood it on it's nose.  Recommend adding down thrust and trying again at the same low turns.  Keep doing this until the model flies out without raising the nose - add some right thrust if it seems to be getting pulled over to the left.

Once it'll fly out roughly level start working up in turns - you'll probably have to add a bit more down and right thrust as you get to higher turns.

One other thing to look at is how much difference you have between wing and stab incidence.  If the stab is more than 3-4 degrees leading edge down with respect to the wing you may want to move the CG slightly back and repeat your glide tests.  Too much negative incidence on the stab (LE down with respect to the wing) may glide test OK, but as the prop increases airflow across the stab and the model moves faster it'll make the model pitch up. 

I like to use an incidence meter (there's instructions to build a simple one in the tips and tools section of the forum) to measure this before starting powered flights.  If the difference between wing and stab incidence is more than 3 deg I'll adjust CG and repeat glide tests before moving on.

Hope this helps,

Mike