On that previous post: I just used that particular PID device as an example of using a PID. Note however, that particular PID specifies that it can only handle 300 watts of output. This limits the wattage of the heater you use. When you select a PID, either find one with a built in SSR that handles the amount of heater wattage you'll use, or get a smaller heater, or use a PID with a separate relay that can handle more power (the PID output, instead of connecting to the heater, will connect to the relay. The relay will connect to the power cable and to the heater. It will also have easy to connect screw-type connectors, so no soldering will be necessary, and the connections would be as simple as the instructions I gave above.