Just for your info Manwon, Jim would build or have built just about anything a customer requested. Many times a customer would take scissors to the old brochures, pick their rings, forearm, wrap, and butt plate, and send it to McD for a quote. Of course the price was much higher than the standard cues. I myself have done this....a copy and paste kind of thing.....and usually within 30 days a cue was delivered.
I have seen hundreds of the prototypes if not thousands, and most often they were always for sale.