Your mistaken twice in theory. First your filter will in no way absorb 25% of your oil. Second save your filters and you can do an ethanol run on them.
Again not trying to bash you but that Is some tane soup. Take that chunk and dissolve it in ethanol and watch all the tane come out.
it would also help to freeze material and tubes and tane prior to blasting, that will help with your color
Dont get upset. People are trying to help you. There is always room for improvement ( in your case quite a bit)Do you have any pictures of finished product?