Re: soldering to pots
Make sure you're using a 40 watt iron, anything less just won't cut it for soldering to pot casings. Some pots have a coating that prevents them from oxidizing, so you may need to sand the pot to remove it because it will also prevent solder from sticking. In this case, it usually takes more than just a light scuff. Get some highly abrasive sandpaper and make sure to remove all of the coating. If possible, I like to use CTS pots because they do not have this coating on the casing.
Ryan