I agree that the 30 watt iron is too little for mechanical joints such as you are trying to solder--pick up a 50 to 75 watt iron(don't waste your time with a soldering "gun", IMO) and you'll be much happier. Also, that 30 watt iron you have is perfect for electrical work. I use a 30 watt weller from home depot for building battery packs and soldering connectors, etc.