I have a Master Forge vertical propane smoker (30" model with a single door). Its been a great inexpensive unit to learn on. The unit has the chip tray (cheap thin metal) sitting right on the heating element. This usually causes a quick flare up and burn of the wood. Last weekend I did some experimenting with using a cast iron skillet for a wood tray. I was doing beer can burgers. The chips/pellets would smoke and smolder well at 300 degrees. But I wouldn't get much going with lower temps. I think the cast iron skillet may be too high and thick to get the wood going? The bracket for the chip tray is probably 3/4" high and 7" wide. I was debating on getting a cast iron chip box or thicker chip box and turning it sideways so it sits about 3/4" above the heating element. Any thoughts?