I am in the process of replacing a filament on my delta-S, the question is do people have filaments repaired or buy new ones. If repaired by whom? I have contacted Scientific Instrument Services in Ringoes, New Jersey and they can repair the filament for $30. Are there opinions out there about repair or experience with this company. Thanks Pat -- Patrick D. Anderson Researcher Great Lakes WATER Institute Univ. of Wisconsin-Milwaukee 600 E. Greenfield Ave. Milwaukee, WI 53204 Phone: 414-382-1731