Yep, that's what I dislike Mick.And I had a 30mm Yaqi with no glue bump at all that was splaying all the way from my neck to my shoulder.
How would they be able to attain or conclusively measure the glue bump to be set at (for example) 30mm?Glue bump may be the creator's choice.
Like, "Hell yeah! I will add 30mm of glue bump to this brush".
But, when the same brush, same model, comes with different glue bumps, I strongly believe that it is an error in manufacture.