Where did you put the CG? And where does the battery go to get it done? (you may want to answer this after you fly it)

I also agree that 29 oz is a bit more than expected, one of the ounces is due to the motor you put in it, so this only makes Filton 4oz off, (unless there are some mods you are not telling us about)

But, btw, you are going to love that motor, it flies a 32 oz plane I have straight up, put a 12 X 6 E on it.