no tip....
spray a little heavier on the stains as i go to make sure it "foams" or draws
all things being equal (electric is a lighter spray, and the HF is heavier sooooo) but i go through about 3/4 of my 7qt for what my 10 gallon electric would do .. ( i have sprayed some jobs with the electric AND HF, sometimes because i have a helper elec, and sometimes, because i want to keep track of the HF output)
and i dont trust the output either, so i mix a little heavier then i have seen most do....granted, no soft water (but that is going to change this month WOOOHOOO) is another reason i mix a little higher....
Waldo...i know you use Cobbs.......run it right around 20oz a 7qt, slightly higher if its nasty, and you will be good to go....
OH another reason for knowing how far vs my electric.....this means (to me) it runs right about what 10 gallon output would be.....sOOOOOOO 2 oz a gallon = 20oz..
right or wrong, i figure it runs around 10 gallons....oh and i did a bucket test a few years back and it was about 10.....sooo there you go