the only place to get glycin is through the photographer's formulary in montana
they can sell you a formulary 130 kit which is ansco 130 ... mix it right away,
unmixed, the glycin will spoil after a while, even frozen and bagged, and sealed
... mixed as a stock solution i have some that is a year 4months old
and works very well, mixed/dilute some say it lasts about 30 days in a tray, i've used some that was
BLACK as coca cola and it worked great ... i've never used ( or ever seen ) a slot processor ..
have fun !