I have two of them... One has a Saito .56 in it and one a Saito .72... The .56 flys real scale like.. You have to get speed up to do a large loop... The .72 is a perfect match for me... The plane can be a little squirly on the ground... With the .72 there is enough power to get it off quicker if necessary... Also I find the extra power helps in crosswinds, go arounds etc... I think if you underpower it you get bored with it real quick.... As for CG I mounted the batteries back in the tail and it balanced right on... Great plane, I am sure you will enjoy it...
I also have the Seagull SD with an .91 four stroke in it... It too is a blast to fly