@bkatz have you checked out @TheLostBiologist’s ethanol extraction SOP?
@Merv I suggest you start here: Ethanol Extraction White Paper
there are also a number of options other that the CUP as far as spinning your biomass to remove solvent. or actually extract in the centrifuge.
@Roguelab & @coppertop have asked the appropriate clarifying questions.
it might be your input. 3 year old barn find is going to require clean up.