Another thing to think about balancing is the prop...most of those 3 blade paddle props I've seen are quite out of balance.
I would suggest you get a prop balancer...think of it as part of your required equipment...your engine bearings and radio equipment will thank you for it.

Another suggestion would be to think about getting a couple of 2 blade props...like a Master Airscrew 11x6 and or APC 11x5 because the airplane flys rather sluggishly with the supplied 10x4 3 blader...especially with those barn doors attached to the landing gear struts.