Any of you guys ever hit one of these. Thinking about buying a used cue and it comes with one of these "ld" shafts. I don't think the original owner cared for it much since there is little chalk stain in the shaft but the original shaft could probably shed an entire cube after cleaning. 
They retail just over $200
https://www.pooldawg.com/katana-low-deflection-pool-cue-shaft
I've never heard of them but they have good ratings.

They retail just over $200
https://www.pooldawg.com/katana-low-deflection-pool-cue-shaft
I've never heard of them but they have good ratings.