I now own two Magic extra 300's. The first one I have worn the covering off of it by flying it so much!!!!

The second one came on a trade that involved Spad's
(I am sure we do not want to open that can of worms here)

Needless to say neither one is flying right now, other planes in front of it!!

But back to your question, to have the most fun with a Magic extra 300 it needs to be a little bit tail heavy, the more the better but not until you get used to it.

I actually flew a Magic extra 300 this afternoon, with one of my fellow club members that was bad nose heavy (in my opinion) but was perfect on CG. So if this is your first Magic extra 300 set it up according to the CG, and when you feel more comfortable start taking weight off the nose, and enjoy the snaps, inverted flight, slow fly, fast fly, harriers, hovering, and generally doing any kind of crazy sh** you can think of!!!!!