I purchased 2 full sets of DJI Carbon reinforced props. I have a Dubro prop balance that I use to balance plastic props with success. I use sandpaper for the blades and the hub. The amount of material seems reasonable and the props works fine that way. I purchased carbon reinforced props directly from DJI store, so I assume they are not cheap fake replica. I have no problem to balance the blades the same way as for normal props. For balancing the hub, I go nowhere, it is fare from balanced. I tried sandpaper, the plastic tape, then aluminium tape. None bring me to a point I would be close to balance. Before going for really machining the hub and removing significant amount of material, I prefer to ask for advise. In flight is not that bad, but at power up (low rpm of props) the bird is shaking like I would expect for badly balanced props. All my 8 carbon props behave the same and the tool for balancing props work fine with normal props. Any advise or similar experience?