Gap experts I need your help.

[Donn]

For those following at home -- I think this ^ was the first mention of the Adjustable Gap Receiver gimmick, "AGR". I was joking when I said that stands for Ambiguous Gap Receiver.

Also, length of shank determines how far the throat etc. are from the gap; width of shank at the small end determines how long the gap is. Fat shank = big gap / skinny shank = small gap.

[toakstertuba]

So I finally got around to measuring a non wessex horn from end of receiver to the beginning of lead pipe. I've found that my two wessex horns have about a half inch more space than a Meinl Weston tuba. So, I suspect my American shank mouthpiece goes just as far into other American receivers, but my setup creates a larger gap. Playing wise, I have no complaints, I'm only curious about the design. Please save any "Chinese quality" remarks for yourself as I am truly satisfied with these horns. Just looking for thoughts on why this distance seems larger than standard.
Thanks everyone!

[toakstertuba]

...

[Three Valves]

I'd hit it...