Hi Finchero!
Well ...... I assumed (NEVER ASSUME) that you were a rookie, but it sounds like you got your thumbs trained pretty well. While the Corona is certainly not an aerobatic heli, it certainly can loop and roll. Now, I don't mean that these will be show stopping beauties by any stretch of the imagination, but they can be done. Otherwise, as stated above, you should be able to have a Corona trimmed and hovering by the third or fourth battery pack. Remember to t a k e y o u r t i m e !
Do a search for "loops" in the LMH helicopter forum, and you will get a few hits.
hope this helps.
Happy and safe flying,
Russ