Thanks for the kind words. Your system is crazy! If I could make a suggestion wearing my plumbing hat. I would maybe use 1/2” pipe stays to secure your water lines and mixing valve and then use some 1/2” foam insulation to eliminate the condensation.
Suggestion much appreciated and I agree. The PEX is only interim, like I mentioned I am overhauling this setup soon. The hot will be an issue as well when the recirculating pump goes in. I have to move this setup to the left 12” and will hardline to the mixing valve at that time. Nixing valve to filter housing will still be led though