Well, all I'm trying to get across to him is that the TBS length WILL in fact be longer than some people's needles enough so that they will not enrichen the mix, or at least not enough to feel any difference. And others will have needles that WILL make TBS needles give them a boost. The proof is in my bike right now. TBS needles didn't make one bit of difference for me. Then i shimmed them and they gave me more power than the stock needles di at thier max, which came at one shim.
As to the actual dimentions, i don't know that you can say "X" of needle #1 is only "Y" more than that of needle #2 and to discern that it won't make a difference unless you happen to know how much a thousanth of an inch might actually make in fuel delivery. For all you know the size difference you quote while seeming like little to your thinking may actually be a considerable difference in fuel delivery. I've looked at the 3 sets of needles i have and as far as thickness it's very hard to see yet it made for huge differences for my bikes performance.
