I remember at the time of the thread if the caller ,to Bluegrass, said Glycine or Glycin.
They are different chemicals. I also wonderer how one individual would go through 4 gallons of developer. They produce for commerical clients and are obviously thinking in terms of deep tanks. It will be interesting to see your results. BTW, have you seen the (PDF) file of an original 777 instructions sheet posted on web?