This is one of those topics that can be debated for months or years and nobody will win.
There are many of us that do not need to use the tsp, some like to use it but it is not advised to be used in some pumps, especially roller pumps. Bob warned people to not use the TSP in roller pumps as it does not mix easily and falls out of suspension easily and over time so it can be sucked into the pump and for those that use the bandit with the roller pump, that spells disaster.
I talked to Bob a lot and I listened to him about this and I am glad as my pump is still going strong. I use only some ingredients but no powders or granular chemicals of any kind, I just don't need them and my roofs stay clean for years. I don't see any reason to add things to the mix.
Anyone can do what they want, they can add everything to the mix if they want to, they can do all the experimenting that they want to, they can destry all the pumps that they can afford to, it is all up to them.
I like to use what works, is cost effective, gives good results and not try to re-invent the wheel if it does not need re-inventing.
This is my opinion, not the opinion of PWI.