I'm certainly no math wizard either, I must rely on a calculator. And actually your 5.5% is incorrect, it should be 4.88%

I converted a 41% concentrate to 100% 128ozs = 1 gal.......128 x 0.02 / 0.41 = 0.0624

We was talking about a HH-HV sprayer or hand held/ high volume. The above concentrate is for HH-HV only, big difference between that and a CDA/ Controlled Droplet Application sprayer, which is much easier to apply 2 quarts per acre precisely.

On page 41 of a Gly4 pamplet it recommends a 5% solution for Annual and Perennial weeds when using a HH and why. The 6.24 concentrate is actually less than what is recommended, if you was thinking that I mixed to hot.