Curious since I can't find the TSP90 locally and am planning to use the real thing too, did you still use the same ratios that the OP suggested or did you go closer to the 70/30 split proposed for the real deal TSP and add in some 7th generation detergent?
Sorry, just saw this post. I used the 96oz of Oxy Free, then the whole box of TSP (4.5#). I then added the prescribed amount of 7th Gen detergent. This mixture is working well for me! Good luck!
