I went back and see you had already cleaned out the tank and tank strainer. Good going. That only leaves the fuel line, lift pump and injection pump to clean out.

It is only optional to pass all the cleaning up if you have tow truck coverage. Right of passage for some ex WVO burners.

The larger nasty blobs you saw in the secondary spin on filter might have been pumped out of the injection pump when you did the lubro molly thing. I suspect this stuff is in the lift pump as well perhaps.