Anyways, do you know the actual particle size of hydro and APAP (guess you will look up know). I never read your original post in this thread as I thought OP, but I see now that you use coffee filter. Dude, that probably lets lots of APAP though but if you are happy with results that's all that matters. Haha, coffee filter if far from scientific and just because water soluble does not mean there is still some remaining in sludgy form mixed up with sludgy APAP. Again, I agree you are reducing APAP, but your also reducing hydro and not even necessary if you are just using norcos as prescribed or in a reasonable manner.
Do you realize how little volume a 10 mg peice of hydrocodone would occupy. Very tiny. Even Roxi 30s have a decent amount of fillers. Now look at the volume of APAP you have left over. You would almost have enough to make up a whole vicodin left over if you truly got all of the APAP, binders and fillers out. I have used much better filtration than you and ran it through multiple times in decreasing micron filters and I still did not have much gooey residue left over and not near enough to account for the large volume of APAP and fillers. Your still have particulate matter for everything the way you are doing it and even the good particulate matter will stick to the filter, get stuck or mixed in the goo and etc. 2 percent estimated loss of hydro and thinking you get most of the APAP out is probably not very accurate. Nonetheless, if you have fun doing it and it makes you happy, go for it.