Well, it's been 3 years since I completed it, but I did balance it per the instructions...and it is balanced...not overly nose heavy. Just enough...and even on low fuel, it is very stable. It is a very easy to fly, stable and forgiving airplane...but it is fast and doesn't bleed speed quickly....so just plan on making several practice approaches on the first flight and make sure you leave plenty of fuel for go-arounds...after the first flight, you'll be relieved and realize how easy it is to fly....Good luck. Oh, and I'm runningeither a 15x6 or 15x8 APC prop on the Saito 125....your 120 should have comparable performance and save the gas engine for zero #2....I'm seriously considering the Evo 32GX for my 2nd CMP 120 zero...presently waiting patiently in my closet until I finish my Ziroli P-40...good luck and have fun.