using an 11*5 prop,do you recommend I try any others?
seems to have plenty of power

I've been trying a lot of aerobatics with it.I can fly inverted all over.I can do consecutive rolls,and tight loops inside and outside.But when I try large loops,I have trouble keeping it from sliding out of it on the vertical part.Probably because i'm not coordinated on the rudder.And I have done spirals,but can't get a true spin.

I am currently running it with 2 batteries and 2 switches(something I picked up online).One battery Is mounted in the rear of the fuse,behind the wing.The front battery is almost right on the cg so taking it out won't change much but I may take it out to make up for adding weight to the tail when I start playing with cg.It balances where the instructions say,with just a slight nose down attitude.I'm thinking about putting some sort of tail skid on the back to add weight and protect the tail.I have tried cutting a small hole in the fuse and sticking weights thru with epoxy,but they already broke loose.So I thought maybe a tail skid,and I can figure out a way to attach weights to the skid where I'll have better control of getting them stuck on good.