Modernizing old house network wiring - Part 14

Modernizing old house network wiring - Part 14 - Updates to my backboard

It has been a few years since installing my network backboard. Since then, I've made a few updates.

Gear changes

I relocated my Apple TV HD from the backboard to my living room, since I now I have a TV. The Apple TV still functions as my HomeKit hub.
I added a MikroTik hAP AC2 to operate as my network router, replacing my hAP AC Lite.
I added an Arris cable modem, replacing my hAP AC Lite WISP strategy
I added a CyberPower UPS to the backboard.
I added a custom-built 12v DC power system, used to power my router, modem, and doorbell:
I added a voltage boost converter so I could power the Ring doorbell with a 12VDC power supply. My Ring wants about 14VDC minimum.
I removed the less efficient 16.5 VAC transformer that previously powered the Ring

In all, my backboard is consuming about 24 watts of power, which includes powering these devices:

MikroTik hAP AC2 router
PoE gigabit switch (with attached MikroTik Cap AC access point)
HD HomeRun TV Tuner (2 tuner version)
Arris SB6190 cable modem
Ring Wired video doorbell

Future Plans

I plan to add storage to my network backboard for TimeMachine backups. I hope to power this with the existing 12V bus, and to have the hAP AC2 make it available to the network. An alternative will be to use an old Apple Airport Extreme to operate as my Time Machine backup server.

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SodaStream 60L "Carbonator" CO2 cylinders have a specific weight when empty, plus about 410 or so grams for the CO2 they should have when they're "full". A little while ago I went to buy a replacement Carbonator from my local hardware store. The dealer pulled a new Carbonator out of the box and sensed it was lighter than usual. He put the "light" Carbonator in the "empty" pile and sold me a different one. At that moment I concluded that it would be smart of me to weigh both new and empty SodaStream carbonators. Here are the results. Weighing a SodaStream Carbonator - for both Science and Consumer Protection. The dealer told me that sometimes the carbonators leak after they leave the SodaStream filling facility. That means there could be an opportunity for customers like me to get ripped off! The SodaStream cylinders I buy claim to have a net product weight of 410 grams - and that means that a full Soda Stream Carbonator shou

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