I have recently been getting a z-axis Stall that happens at the same point no matter which project I am carving. The first thing I tried was reformatting the flash card and re-uploading the project. This allowed me to complete 2 signs before it went back to stalling at the same point. I clean the rails and lubricate regularly. At this point, I ordered and replaced the FFC cable. Still stalling. I had gotten a trojan virus on my computer that I used malware bytes to remove. there is no more trojan being detected, my computer still runs very slow. Some times when finding the bit, the z truck will move in a jerky fashion. Is it a corrupt flash card that needs to be replaced? or something worse? Any insight on this would help tremendously. I have a bunch of orders to get out and don't want to miss out on taking more orders this weekend. Thanks.