I would call any one of a kind cue a "custom cue". I would also call any production cue that the customer ordered to his specs a "custom cue". My question now that I have established those two things as facts in my mind, is this: If someone brings you a production cue to customize for them, does it then become a "custom cue"? Example: You add a lizard wrap, or you ad some inlays, or you build them a new shaft and change the weight.
When someone takes a regular off the line Van and fixes it up inside and maybe paint it up fancy, it then becomes a "Custom Van". When someone builds their own hot rod out of an old car it becomes a "Custom Hot Rod". I personally think people are being overly picky about what qualifies as "Custom". I have almost exlusively built one of a kind cues. Many to the customers specs and many to my own. I consider them all "custom cues". I even use the word "custom" in my brand name.
When someone takes a regular off the line Van and fixes it up inside and maybe paint it up fancy, it then becomes a "Custom Van". When someone builds their own hot rod out of an old car it becomes a "Custom Hot Rod". I personally think people are being overly picky about what qualifies as "Custom". I have almost exlusively built one of a kind cues. Many to the customers specs and many to my own. I consider them all "custom cues". I even use the word "custom" in my brand name.