This is awesome John! And so cheep too (as compared with some whoop-dee-doo instruments that I last knew about)!
How long does it take to accumulate the silver? A full cathode means what when the rubber meets the road? Say I'm developing about 12 4x5's and a roll of 120 per week, and about 20 test strips (5x7's) and maybe what.. 10 11x14's, per week, and say I throw out my fixer before it is fully spent (I like fresh dependable fixer you can hang your hat on for the time it requires). Since I don't know what the workload of other photographers is like, maybe you could give me an idea from that? I'm guessing it would be more than a year to get a full cathode. What do you think?