Since you said hydronic floor work was coming soon, I went back and looked again at the picture with the hydronic floor layout on it and something jumped out at me. What is the run that is shaped like S's all about on the lower left side?
I read {after I poured concrete, of course} that you want to be sure and leave plenty of room if your hydronic floor goes past a toilet. Too much heat around the wax seal and you may weaken it. Nobody wants a leaking toilet seal..... Since it seems to be taking the rest of my life to finish the project, I've not finished the downstairs of my project so the toilet is not in and the hydronic floor is only pex in the slab thus far.
{Can I call it downstairs if I haven't actually installed the stairs?
}