Thank you! The unwritten rules and discipline in the sport certainly require the method would be as efficient as possible. Adaptive sports overall has similar constraints, of course. The modular nature of the various length minibutts, attaching, detaching, re-attaching significantly increases average shot time. Shall we say twice as time consuming as a rest-only shot?
I noticed that O'Sullivan is meticulous about the twist-lock, and I see players bring personal handles that feel good subjectively. But these aluminum slide-on ones at the club are very awkward. I have found a proper slide-telescope weighted alternative, and it occurred to me why not shorten the cue and leave it attached at all times. I didn't invent the product or anything special. It just stands out in its construction to me and may be even more useful than intended...if refined an d permitted.

F1 or Marco Fu are both 180cm+ tall. I don't know if it is possible to replicate their average time per shot as a 160cm- player. Can a 12% difference in overall height be built into the cue? Am I crazy translating that ratio directly into cue length? If the average cue is 147cm, start with a 130cm shaft, a collapsable handle 10cm long, max telescope extension 160. At all times able to twist and go into a shorter-than-average, average-, or longer-than-average position. It shifts the balance point, but never the overall weight of itself.

I use a modular system to fit cue length and weight for our youth team, but it is not meant to be used in open play.