Wall Colmonoy Brazing Engineering Center. Cincinnati, OH. This three-day brazing course from Wall Colmonoy Corporation covers brazing design, metallurgical aspect of modern furnace brazing, brazing material selection, brazing operations, quality control, real-life applications and case studies. New this year is a half-day of practical experience on the shop floor consisting of pre-cleaning, blasting, selecting fixture, setting furnace cycle, examining brazed parts and filler metal application methods.