The 6 step E-6 Tetenal kit is a 5L kit. Same as Kodak. I always use it to the maximum capacity that Kodak indicated on their own kit (500ml to dev 4 rolls of 120). Never had a problem, even as the kit ages.
I got it here:
241 North 12th Street
Philadelphia, PA 19107-1722
Thanks a lot for that info. This is helpful.
Did you do a walk in or did they ship to your location