I love my geo CaRx. No doubt about it.
It is very true though that you need a good quality regulator. Many people love the carbon dower because it’s electronic etc, but a good dual stage regulator built by Alan or yourself (on the other sites there are plenty of ppl willing to help in threads designed to build a regulator) from there it isn’t much different than dosing. Set it today, test it tomorrow and change as needed, then do it again until you get where you need to be.
corey