In this episode, the Harrison and AJ discuss recent issues with AJ's CNC machine's touch probe and spindle. AJ describes troubleshooting the touch probe's reliability problems, involving a stuck probe and flickering issues during rapid movements. AJ shares his solution of modifying the probe's spring and adjusting debounce settings in the configuration files to eliminate false triggers. The hosts then delve into AJ's spindle problem, which caused the machine to halt during operation. After a detailed investigation and consultation with the manufacturer, it's determined that loose components within the spindle assembly led to the problem. AJ plans to replace the spindle under warranty and discusses potential adjustments to the spindle spacer. There's also mention of noise issues related to the spindle assembly. The podcast episode concludes with a consideration of whether to keep the current CNC machine or upgrade to a newer model.