I have the shower riser at home already, so it will be available when they come to measure for the glass. I've decided to alter the design a little bit and have the riser come over the glass in an arc instead of through the glass, so that should make things a bit easier. I am also planning on having the glass fabricator make a (frosted) glass topper for the knee wall - unless you can recommend a better material for that purpose? I'll make sure they know to do the holes for the brackets in the shop, though! The glass people I've spoken with suggested a bracing the glass with a chrome bar extending from the long shower wall to the glass wall (the one with the showerhead) - I'll be sure to ask if any other supports are necessary. Thanks again for all your help with this!!!!!

"Why don't you guy's - roof35 and Mongo come into the 21st century?" geoffrey, seriously? No need to throw bricks. I addressed transitional applications in this paragraph: "Is a new thermostatic shower valve right the easiest way to control temp? Probably. But it's not the only way. Especially in remodels in older buildings. Opening up walls to change a valve can result in changes to plumbing, which can lead to all sorts of issues. When remodeling in older buildings or houses, there certainly are different strokes." Not everyone wants a gut remodel.Not everyone wants to open up a tiled wall to install a new valve. Not everyone want to disturb original plumbing inside of a wall. Not everyone can, for myriad reasons. But in old construction, you can go from having no scald protection to having scald protection by installing an in-line thermostatic valve. And they work just fine. Down the road when a true remodel occurs, then tile can be popped, or complete walls can be opened up, and a shower valve with anti-scald protection can be installed. If you want different water temps in different locations, you can do so. It's not that hard to do. It might hurt to think about it, but with "modern construction" what scald protection do you have at a kitchen sink? None. A bathroom sink? None. The only place you have it is in a shower/tub. If you install an "ancient decrepit" whole-house valve, precious children and Alzheimer-suffering old folk across the globe will have scald protection wherever hot water can flow.

Dream, In your original question, you were looking for a separate volume control. This allows you to control the volume of water coming out of the shower head. A theromostatic valve manages the temperature of the water. It allows you to set a temperature and just turn on the shower and the water will always be at that temperature. If you have a pressure change, in a thermostatic shower, rather than changing the temperature, you get less water but the temperature is constant. I am not sure why it would be more to install than a pressure balanced valve though. The functionality is in the valve and the installation is the same as a pressure balanced valve. The cost of a Thermostatic valve is more than a pressure balanced valve. I will post a video once I find it from a hansgrohe explaining the valve set up in the bathroom. I found it useful to understand the functionality.

Sounds like you’re already re-thinking, but just to add on with a cautionary tale, my laundry is located in an unfinished basement with a rubble/fieldstone foundation and an old (now unused) brick chimney that starts high on the wall above the washing machine. When we moved in, we had no way to vent the dryer, so we vented into a bucket—a temporary fix that went on far too long. By the time we got it vented properly (6 months later? A year?), we found that the humidity from the unvented dryer had damaged the exterior of the brick, which was/is now crumbling off a fine pinkish red dust. As far as I can tell, there’s no fix. Now that the harder brick exterior is damaged, the bricks will (and do) keep crumbling into powder that I keep cleaning up. Based on this, I’d never want to keep bricks exposed where they would be repeatedly exposed to steam and humidity, even if they weren’t getting wet.