Using the Jet JT9 - 719401 Bed Extension is straightforward. First, select one of the three available positions to mount it according to your project needs. If you're doing larger outboard turning, choose the appropriate position for that. For projects requiring a 60 - inch distance between centers, pick the corresponding spot. When you're ready to start working, make sure the extension is firmly attached. As for the tool rest post that comes with it, simply place it where you need it for easy access to your tools. When it comes to maintenance, keep the extension clean from dust and debris after each use. Check the mounting points regularly to ensure they're tight and secure. If you notice any signs of wear or damage, don't use it until it's been inspected or repaired. With proper use and care, this bed extension will serve you well for many projects.