I am now an official 436HP owner. I am in the process of learning the Sentinel software. I am finding that this dynamic memory is a bit different than object-based. I still cannot understand why there are limits to the numbers. I think it said 256 Favorites with 100 numbers or something like that. Still trying to understand this architecture. In fact, I'm almost afraid to fire that radio up. I am going to re-watch all of the great You Tube videos again & examine the files people have sent to me. Once I see how these people have programmed things, I can model their behavior. I think I might have a head start since I already know how to program large P25 statewide systems. From what I understand, I'm not bound by 32 frequencies per TSYS load. That is a good thing.