Yup, about what I do. Also the 1.1 ml pump gets rid of the hassle of an inline flow restrictor. I used to have my RO hooked up to a trio of solenoids (freshwater, ato, kalk). I added a flow restrictor and then a .5gl per hour micro emitter to ensure I didn't kill the tank with kalk accidently. Sure made life a lot simpler when I started using a dosage pump pulling from and ATO container hooked up to the RODI and a couple of solenoids. Using the 50 ml per hour pump you could dose about .8 gl per hour - probably way too much but again spreading it out over the low PH periods may really help with stability.One of options we have talked about as a ULM approach to kalkwasser is using a dosing pump to dose freshwater from the trigger storage container in the softy tank through a kalk reactor. This would allow you to limet and time the pH effect to your exact tank desires.
It should be fairly close to fully saturated in the reactor so the dose should be stable enough and easy to adjust with growth. I think the kalk reactor would likely only need to be refilled every month or two with tanks like this. The ATO could independently replace additional freshwater.