Im late to this thread but i use those same block bearings for my low rpm finishing lathe, that spins slowly while epoxy hardens.
It looks like your design is good enough, but if you wanted to improve runout you could use a belt and pulley to drive a mandrel that’s fixed in one of your...
Krause apparently in the final 64, with the field spit between the good Chinese players and everyone else who is learning to play nine ball on Chinese tables. Krause is in the later group, I wonder when the brackets merge?
Also, if he is at all the pro tournaments he can generate a lot of content interacting with the other pros. There is a guy on TikTok that films short clips of him playing one rack against the top pros. Fedor has his own channels as well that can be good to watch.
There was hubbub on the Facebook cue building groups when these were first announced and a few people reported buying them and posted some initial feedback. But I haven’t seen much since then, which probably is our answer (you get what you pay for).