I just finished my aresti, put in a saito 72 gn in. it came out nose heavy so i moved the battery behind the second to last former. with no added weight it now ballances between 3 3/4 and 3 7/8. I havent maiden flew it yet. I was going to try a 13x7 acp first. does this sound ok? What props are some of you guys using with the 72?