I currently have a ClimateMaster Tranquility 27 Series 5 Ton open loop set up installed in 2010 with a 2010 Franklin Monodrive and an 1hp single phase pump. I am upgrading the well drive and pump for an assortment of reasons/problems and it has been recommended that I upgrade to a Flint & Walling TVS 1.5hp drive and a commander pump, motor and controller along with 12/3 flat jacket wire. I was told my current set up with the Monodrive was not a good constant pressure set up and is also costing me a lot in electricity? Does anyone here have any experience with a Flint & Walling set up as described above? Does anyone have any recommendations as to another type of set up? Thanks in advance! Rick