Yes. The back part is called the V3 electronics " or something and it goes on thr scale itself. Not sure about the "TX" but the AD 120i will definitely work with the IP. The new whole system that hasn't been released yet, as well as just the trickler that works with the V3 stuff, the AD 120i is by far the most common scale used for it.
For everything accept maybe bench rest stuff, the AD is pretty good. It's fast, it's affordable, and it weighs to .02gn. That means that your load is going to be within a single piece of H4350, as most of those little pieces weigh about .025gr. or more. The new Sartorius scale is really slick and is more accurate (.001gr i think) and has zero drift apparently, but I don't know how much it would actually improve your load by if any at all. Who knows if a single flake of ball powder makes a difference or not.