Hey Guys, I'm at the point of selecting a flow center for my DIY geo install and wanted a gut check before pulling the trigger. I have a 5 ton, single stage Bard HP, and just finished backfilling 6 horizontal slinkies (6x 600' 3/4" loops in parallel). The HP literature recommends a minimum of 15 GPM, and has a drop of 18.7 Ft of Hd at that rate. With 20% methanol, the CM worksheet puts me at 10.8 Ft of Hd for the loops. All six loops come through my slab and are headered mere feet away from the HP and planned FC location. My preference is for a non-pressurized FC, and I really like the B&D QT setups. I was hoping to get away with one 26-99 pump but I think that'll be too marginal (the Reynolds number is right at 2500). I'm now leaning towards a two pump unit with a pair of 26-99's. I see I can get one of these for just shy of $1k; a few hundred bucks more than the single pump. Think that'll do the job? Incidentally, I do have a good-used pressurized FC I was given that has a pair of 26-116's, but I've read they're power hogs. Perhaps I could sell that to raise a few bucks towards the QT. Any thoughts or advice appreciated.