I had to replace the mixing tank with a bigger one. Am I just being too picky?
Trying to figure out why you had to replace the mix tank? I bought the Small Air Logic Mix tanks, 6x8x12 with a usable 8-10" depth...So about 2 gallons of mixed solution. I use them for all LP and
soap/wax for a 4 bay....FB uses 20oz per minute per bay. For a 5 bay, that's 100oz per minute. If all 5 bays were using FB, it would only have to regenerate maybe once a minute. So what am I missing here. I've never had an issue with the size tanks I use. Did you try adding more sand in the hydrominder float to change the regin timing?
As for the wiring....I think we already addressed if all the commons are linked, the wiring would be a piece of cake. Most integrated systems I've ever seen assume this would be the case. Thats why they only have room for one common on the terminal strip.
As for being picky? I don't know. You had the experience to trouble shoot it and make it work! That's a good thing! For me, this sort of thing happened all too often. Thats why I design and build my own systems now. Usually save about 50-75% in doing so.