Petur Larsen has developed Opti-Trim. The Opti-Trim is an adjustable and effective knife set solution for the BAADER 189 filleting machine. In comparison to the standard solution for BAADER 189, with the Opti-Trim solution, the belly knives open mechanically each time the saddle passes through them. Doing so allows the knives to pass the backbone of the fish as close as possible. Using this method leaves more meat on the fillet and therefore a higher yield. Furthermore, a symmetric cut leaves you with a better-looking fillet.