I was not really happy with my flight performance of my 3" version so 1st I decided to use IH3 frame instead (which did not change much). But then I come up with idea to use 4" props. So I purchased 4" arms and Emax 1606 3300kv motors. Put that all together and it's amazing. I am below 250g with 550mAh battery and it flies really good. Much more hang time. I am even considering bigger battery to add some weight to it. It does not feel natural at this point :D .