I've not noticed any issues with the toilets, no. But then, we've only lived here since December, maybe there will be some surprises down the road, haha. It's strange that the pressure in the kitchen is so high. The pressure in the upstairs shower is pretty horrible, LOL.
I will periodically test TDS to make sure nothing has gone awry (like the tape seal failing in the membrane). Now I'm happy to know I'm getting such a good brine rate due to some normal, explainable thing, not some error in my setting up or some issue with the unit. I certainly will not complain about getting such efficiency from my unit, LOL. I just wish the TDS would go down. I'm at around 14 right now, from the bladder. Meh. And now, since the dH2O gave me a reading of 0ppm, I know it's not the meter. What a pain. Could it be because the high pressure is forcing too much through the membrane too fast? Would a more... restrictive restrictor (LOL) potentially help cut the TDS down?
And, yeah, once I get my replacement cap for the DI canister (assuming I get it before I leave), the system's being left alone, but closely monitored. Right now, it's sitting under the sink, all set up (minus the DI stage), with a full tank of fresh water. Interestingly, when I tested the water from the tank this morning, it was at 8ppm. Now, with the exact same setup, like 14ppm. Will be interesting to see if it's lower again tomorrow morning, even though it'll be the same water that's in there tonight. If so, that would suggest the "fines" from the carbon are settling in the tank.
Thank you so much, Butch, I can't begin to express my gratitude for all your help and guidance.