I suggest you try the waterboss. I would guess there’s almost zero chance you’ll go back to cheap garden hose spray gun setup.
Ordering from the company’s website is an experience, it’s a little like ordering off Temu 
but they ship super fast so whatever. We’re just a small niche in their business, they make most of their money off industrial spraying (think like assembly line food prep stuff) but the fact their guns are stainless steel and 1/2" constriction makes them perfect for our soft wash setups. They’re very well built. I use a ZK1 unloader so I use the 3/8" waterboss with my pressure washer (if you run pressure trapped unloader on your pressure washer then its NOT advisable you try the waterboss, don’t ask me how I know!) and I did buy back ups for both my pressure washer and soft wash setup but I don’t foresee needing them anytime soon, just that redundancy is a good thing with everything on the rig.
