First time I did use KNF, but the Trainwreck run I did not. I didn’t expec the KNF quantities (1-3 teaspoons per gallon) to have such a huge impact.
Honestly I think it makes more sense to buy light mix and feed, but 50/50 cut was fine.
I can’t make a promix recommendation, they sent me the wrong bag and I didn’t have time to do a return, so I used one I wouldn’t have chosen, and that’s the only time I’ve purchased it.