The I1 propelles cannot be checked the same way as Phantom and many other multicopter props as there is no hole through. I've seen in some video a balancing rod for I1 props. Anyone have this rod, and if so, is there usually any unstability in the normal I1 props? From where to get this rod? The Orion one (Amazon.com) needs to have threads in the prop but in my props there are no threads in. I guess the props and their balance are one of the most important issues in good flying performance. Weird that the prop balancer rod is not including in to the I1 set.