Welcome to the forum! And a big thanks for your service.
I can't address your black tank questions, but went through a similar transition from 5th wheel to a 33' Class A. It was more like the Ace 30.3. After a few years, we traded to our current Vegas 25.2.
The 5th wheel and our big pickup no longer fit the way we traveled. We pull a small car, and with the Vegas has been the right combination for us and the way we like to travel now.
What are your concerns about the black tank on that model? Maybe if you are more specific you'll get the answers you seek.
If all else fails, read the directions!!