a It would seem that picking the right bass neck is much like buying a pair of shoes.... If you take a size 8 you're not going to buy a size 12. Since hands come in a multitude of sizes:- Is there currently a formula that can be applied to matching a hand with a neck? In other words:- Factoring in the length of your fingers, overall size of hand and the resting distance between your thumb and your index finger..are there certain parameters you should not exceed for your best "playability"? Neck width. Neck thickness. Nut width. String spacing. All these are going to be a factor in your playability depending on the size and idiosyncracies of your fretting hand. No matter whether you're playing a shortscale or a long scale. Formulaically and ergonomically, what are the "specs"? If you are a person that can afford to have a custom neck built to match your fretting hand exactly......what numbers are they going to use? (or if you happen to be shopping "off the shelf").