Using this Hypertherm SmartSYNC hand torch is a breeze. First, when you need to change consumables, just use the simple twist - on method. You don't have to walk back to the power supply. Just adjust the power and amperage right on the handheld torch as needed for different applications. As for maintenance, keep the torch clean and dry. Regularly check the 50' lead for any signs of wear or damage. If you notice any issues with the consumable installation or the power adjustment controls, stop using it and contact customer service. Also, make sure to store the torch in a safe place when not in use to prevent any accidental damage.