I Have a Gerber enVision 375 that the vertiacl and diagnal cuts are, my best description is, starting to kind-of chatter. It is not making a smooth cut. It is making somewhat of a perforated cut. I can't always weed completely because sometimes the "perforated cut" is not completely letting go. Has anyone else experienced this problem, or can anyone give me some help? The cutter is in a clean environment and has a new knife assembly. Help would be much appreciated.