Good idea with the kids - the touchscreen would have to be pretty locked down to prevent them from making your house go crazy 
Awesome! We’re thinking alike! ^ That is precisely the reason I designed this thing in the first place, and why I added the external sensor/connector in a servo pinout. I’m hoping to eventually control my registers based on some room-balancing, too. If you haven’t seen it already, there’s a great write-up of a solution on this forum, which uses H-bridges and old ventmiser registers (basically replacing the ventmiser controller with a pre-wired ESP8266/Arduino, while keeping the original motor). As you’ve probably heard from anyone you’ve told this idea, you’ll want to monitor the differential pressure on your blower motor when closing vents (the “SAT” range varies, but for my motor, I don’t want it to get past 0.5 inHg. I’ll save you the trouble of finding a good sensor and dealing with analog pins on ESP8266 (don’t bother! 
) - the MPXV7002DP sensor with an ADS1115 ADC is the way to go!
I share your concerns, but the IRM-03-5 supply aderusha uses in his HASP project is actually a very good unit made by a good brand (used all over the place in household electronics), so I’m not worried about it being in my walls. Much easier than pulling DC cable to every place I’d want to put these
I’ve shared my breakout board files on Github, including the Eagle .brd file you’ll want to use for OSHPark. Use the v1.1 files for now, as I’m still testing v1.2 - and the version posted doesn’t include the latest changes I made - waiting for those boards now, if they pass my testing, I’ll update the repo.
Awesome - looking forward to seeing what you come up with!!