I use a badger mixer like yours, I used a flat file to cut down the rotating tip, Works great and fits into my Vallejo bottles.
I purchased ss balls off Amazon, they also work well.
I believe the Bandai Star Wars line of models are best I have ever seen. The engineering on these models is off
the charts. That Storm Trooper looks real, hard to tell this is a model. Great job on this.
My favorite is the Badger Krome. I also love the Patriot 105, I sometimes think you can spray asphalt through the 105.
I like Badger brushes for just about all my painting needs.
hagakure.s81 , just make sure the tanks are rated for the pressure you want to charge them up too and they
have some type of safety relief valve. Good luck, sounds like a good plan.