Probably no one. I spent time at the SW shop when Jerry was alive and had not seen a cue built with the same care. They were not just thrown together.
Every cue had tags on them throughout the build prosses. Everything was marked to achieve a predetermined predictable outcome for each cue I'm assuming to the customers preferences.
I have been in quite a few cuemaker shops. Never saw anything like they do at SW. Now, Jerry has been gone for a Long time, I can't say how the shop runs today.
Another thing, with everyone throwing after market CF shafts on cues today, does it really matter who built the butt anymore? I play with a cue I love that I built myself. Have to be honest, I'm probably going to get a CF shaft out of curiosity. I'm open minded.