well described, sums up my point of view too

as for the freeze precip...  SWIM might try that, just evap it all to very saturated level and stick it in the fridge... 

but first SWIM has to see what kind of limonene he can get around these areas...   then swim would see if evaping would leave residue.. if not, then SWIM could always just evap it if freeze precip wouldnt work

SWIM really wants to try this tek, and will as soon as he acquires the limonene...