Now that we are (sort of) getting closer to Base3 being a reality, I made some more progress with my getting ready plans. I updated my Legacy controller (AKA Cab2) to Version 1.74 using the Legacy System Utility.
I've been waiting to do this for a few months because I had a (total) hip replacement 11/27/23 and was not allowed to do many things including going under my train table. I needed to do that to get to the wall transformer for my Legacy base. I had the wire from the transformer neatly connected with wire ties behind the spot where my Legacy Base is sitting. I was able to get my son to go under the train table and cut the wire ties to free the wire a few weeks ago with my guidance. I finally unplugged the base to bring it to my desk to connect to my PC to do the update. I had the good sense to include a serial port on the computer I bought in January (even though I know I could have used a USB adapter. Worked perfectly.
Now just "only" about 4 months to wait!