I've been following all the Black Box Posts with great interest. After reading all the stuff on the Pro Troll web site I checked out my glass boat as they discribe. My natural voltage was .485, so I cleaned the zincs and tested again. Now it's .425. My outboard is a 2002 Mercury 4 stroke and it has aluminum anodes so I guess my glass boat is going to be low on it's own.

Last Saturday I fished fresh water for trout/salmon. I ran lines close to the cable and also set them back about 30'. I caught fish at all depths (55' deepest). Of the 3 boats that fished together I caught most of the Lake Trout (14). My total catch for the day was 30+ fish- 14 Lakers, 2 Rainbows & more than a dozen small Salmon 12-13"(landlock Atlantic's).
The total catch for each boat was in the 30 fish range each but the other two caught bigger Bow's and a couple Brown's.
I'll be going out again this Saturday and dink around with various distances from the cables and make note of the best producers.
I don't know of anyone here locally using the Box so getting info on how it's affecting the catches here in non-existant.