On-site support for UF/DF TFF system operations as well as equipment and membrane training when working with either hollow fibers or cassettes.  David has developed for nearly 3 decades stainless as well as SU-TFF systems for various applications.  Having developed the bench scale to product scale TFF systems at Spectrum as well as multifunctional TFF systems at Pall Corporation, multiple designs have given great flexibility to the biopharmaceutical market-place.  Lets review your process situation!