PlanetCrypto, thank you so very much for the detailed answer. It is as I suspected, and I appreciate your thoughts. Nice set up, if you come across any pictures, I'd love to see one installation. I'll check out the links later.
You're right, I would MUCH prefer a C1 instead of the S3+, but I don't think it makes any sense to chase down a cheap one now and throw MORE money into BTC mining. If one came my way, fine, but I don't want to chase for it.
That said, I'm enjoying this little project, and would consider buying whatever comes from the mind of sidehack and Novak to upgrade the S3+. Sidehack and I don't agree on economics and what constitutes profit, but I like how he works and want to support the effort.
Profit is a nebulous term. What I pay attention to is retained earnings.

Not as I'm using the term.
Still kind of makes me sweat to think of filling my apartment with that again. Heh.
Even if it was just one.