If you have the original panic, the main thing is the CG. This is the same on the new one. 4 inches back from the leading edge of the top wing. I am running mine at about 5 inches and it is wild. I had the old one for nearly 20 years and finally sold it with an ASP 91 to fund the new one. I have a West 50 on the front and it weighs 5lbs, the old one was just over 6lbs.
You will love it's wild antics as it does things you didn't now a plane could do.