FYI, I used to be a fan of hub balancing. Until I started seeing the hubs develop cracks on the side I glued the velcro or 5 min Epoxy on. Also that side sinks and then you have a non-level surface for the prop washer and bolts to sit on. Not good. It's happened to 3 props now and they all had the glue on one side of the hub. The props that didn't have their hubs balanced didn't do this. My theory is that on a non-balanced/non-glued hub, the hub compresses evenly and no cracks appear and no sinking (the sinking happens from the cracking). The ones that have been balanced, the glued side of the hub is harder and doesn't compress as well as the non-glued side. I'm almost 100% sure this is why. So now I shy away from balancing hubs. If it's that far off I'd prefer to not use it. None of my Xoars have been that far off on the tips or hubs. In fact I bet I really didn't need top balance any of them, it's just kind of fun. The tips will always be balanced though. I have the balancers and I just spray clear luster coat on the light tip. It's so friggen easy. The hubs probably not any more. Just thought I share my experience.