I do A/B using MHRB and I don't even defat any more. I recrystalize to clean the spice and anyway, with the use of a separating funnel it all comes out very clean. I did an MHRB & Chaliponga extraction a few days ago and that required about 8 defats, boy, that was like a full on lipo operation. I won't do that again in a hurry.
If I do defat, with naphtha, in a milk jug before basifying. I shake it like it's never been shaken before then drain it off and discard the solvent.
If the solvent separates and is still clean and there is no fatty emulsion, then it's clean.