Reading between the lines, or what you did'nt say.
No mention of the 3 grades, or 3 runs.
So im guessing you maybe bundled 3 grades together, and just did one long run?
Residue = plant material
1st run for a few minutes, clean the bags into 3 piles-this should be A grade stuff, or 1 of the bags should be killer.
2nd run 5-10 mins, clean the bags into 3 piles-this should be not quite as good as 1st run.
3rd run for as long as you like to get ever last thing you can out of it-1 bag will be more or less junk,1 bag cooking grade,another could smoke at a pinch.
1st run should be cleanest, or free from plant material 3rd will conatain some plant matter.
53/74,90 microns or whatever your set might be , 1 bag will hold the most trich heads, another brocken heads and the other will be capitate trich stalks. Deters strain to strain what size the heads are.
Getting in with a scope can be handy.