After freeze precip I always have a problem with residual naptha being trapped inside of the spice after I deccant. It causes slight yellowing of my freeze precip. I imagine a vaccuum would solve that. Did you do a side by side of vaccuum pump and non? Id like to see results.
"I am cursed by the blossoming knowledge of my feminine ideal and she looks suspiciously like you."
"Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid." -AE