You did not want to do a water test, you have obsolete and discontinued or proprietary valves, (Erie 541 was sold off many years ago, Rainsoft is proprietary), and water treatment technologies advance and change over the years. You are asking us what to do with a model T and how to make it work without giving us any parameters nor listening to the advice given. Many people on this site have tried to offer you assistance, even over the phone. Toms comments were justified. Then again, there are a few licensed and highly qualified advice givers on this site, as well as a few people who dont have extensive feild experience but enough knowledge to be helpful as well.
In case people havent noticed, on well water, i give very little advice until a proper water test is done. if someone wants to take water from a constantly changing source of unknown quality and consume it and bath in it, I have no desire to have any liability when they suddenly discover their water has been exposed to naturally occuring arsenic, or that the military base 30 miles away was dumping jet fuel and cleaners on the ground 20 years ago and those chemicals have migrated into their aquifier.
Anyone who owns a well and never tests the water should not be helped. Especially since good water testing costs have dropped to below a coupld hundred bucks now.