Following up here as I went ahead and ordered the Blendmount BV1 and Mirrortap MTX during their Cyber Monday sale. The install with my V1 was pretty easy using the connector for the auto-dimming rearview mirror as a power source. It sure is good to have my V1 with me again!
A few notes on the install process: Remove the rearview mirror and the two pieces of the housing to access the connector you'll need. When prying off the larger housing, note that it has two screws on either side of the mirror post that are a #10 TORX if I recall (or maybe a #8?) - so be careful to not pry it off with those still attached or you'll break the plastic. Inside the housing, you'll find this Molex connector for the rearview mirror with a green, red, and black wire. I used a multi-meter to verify that I was getting 12v power to these and then used the Mirrortap connectors to tap into the red and black wires as shown.
Next, I secured the Mirrortap wiring and used heat shrink wrap to make everything nice and clean-ish and most importantly, securely just in case the V1 fell off the mount (which would be very difficult to have happen).
Then, I reattached the mirror and secured the housing back in place, pushing the wires back into the housing.
Finally about 1.5 hours later, mostly due to me taking my time, it was time for the test drive! The V1 works great and the Blendmount makes for an exceptionally clean install!