Using the Cobb double adjustable short shifter is quite straightforward. First, refer to the installation guide that comes with the product. It's an intermediate - level installation, so if you're not confident, it's a good idea to get help from a professional. When adjusting the shift knob height, you can set it 1' higher or 1' lower according to your preference. For the shifter throw, you'll need to cut the trim ring first, then adjust it to be 10% longer or 25% shorter. This allows you to customize your shifting experience. As for maintenance, keep the shifter clean and check the steel socket head screws regularly to make sure they're tight. If you notice any issues with the adjustment or performance, contact Cobb's customer service for assistance.