I purchased a Dieselcraft OC20 to filter my WVO. Just got done testing it on 5 gallon batches.
First 2 batches were WVO filtered thru a 50 micron bag. I heated the oil to 150 F and it pulled a lot of crap out. The second test was with oil I had filtered with a 1 micron bag. I heated the 5 gallons to 150 F and it pulled out some really fine sludge.
I wish I knew about the OC20 centrifuge before!