You should not fly blind. Just do the FAS-DPD test and follow the SLAM process correctly. The water is not likely that colored in a small sample.
I would try turning down the pump time at least an hour if not more. I've found a page from google in the past that lists gallons per hour for almost every pump made. You could try that to find out how much your pump is in gph and figure out how long it takes to turn your water in your pool. Since my post above yours, I turned down my SWG to 50% output and will run that for a week as my FC is also hovering around 6 quite often. If that doesn't work, I will most certainly turn down the runtime another 1/2 hour. It's a delicate balance that takes some fine tuning with a whole lot of patience.
Since you're tasting the salt easily, maybe you should really look into turning down the runtime of the pumps and increase the cell time to get the cell to convert that salt to chlorine. Chances are you may not even have to run your pumps more than 5 hours or so depending on your weather. Here, it's hot and hotter. My overnight lows are mostly in the low 80's. We've been over 100 degrees for more than 6 weeks in a row now. Try turning down your pump time and increasing your cell %.