Gary,
As soon as you said they don’t ruin my axles. I said oh he is soooo right, that clamping system is so much nicer then a set screw digging into your axle. So I immediately went to Comet kart sales and KartSport to look at them again $249. each $500. for bearings if I don’t use the third bearing cassette and I know if I install them someone will hit my tire bend my axle and ruin a bearing the following week it’s just my luck! I totally agree with you Gary but I just cant pull the trigger on them :-)