I have a little story that relates to this situation. A guy in my league wanted a cheap cue as he is a beginner but wanted something consistent instead of a random house cue. I had hung onto a couple early creations and he really liked one of them. It had a slight tip lift when rolled so I agreed to redo the receiver, reface, or whatever would correct it. I obviously wasn't going to make any money on this cue but I had to learn what was going on. I refaced it, then redid the receiver and it still had a little lift at the tip. Even though both butt and shaft rolled straight.
Here's what was odd, I could put that shaft on two of my butts (made by me) and together it rolled straight, visa versa with the butt with my shafts (made by me). Honestly I'm still trying to work this one out by refacing, drilling out, plugging and reinstalling a new receiver. I'll find out next week if that worked. As an amateur, I'm still learning and glad the guy understood that from the beginning. This is why I haven't tried to advertise my cues until I have more figured out. The locals and my friends know where I'm at and I'm not getting trashed by those that expect perfection. Don't get me wrong I've made some nice cues and have happy customers.
Happy New Year to all
Robert