My heat gun is a 1500-Watt dual temp from Harbor freight. I like using it for jigs weighing 1/8 of an ounce or more.
For jigs weighing 1/16 of an ounce or less, I use disposable cigarette lighters. Cheap and they last a while.
I haven't bothered to put together the components for my fluid bed simply because heating the jig head and then quickly "swishing" it through a bowl of powder works quickly and well for me. I purchased some 6.5-oz. glass "hoops" bowls with plastic covers recently that are perfect for my powder mixing, storage, and painting (swishing) needs.