Sounds like you already bought the burners you have. I have 2 banjos in my rig, and IMHO, they may be cool, but they're overkill. I never have to turn them up past 50%, so you could very easily go with a smaller burner and get the job done. The 170k burners will work great, and they are WAY easier to mount/shield. Stick with what you got, and try to keep the burner 4" from the bottom of the vessel. If you shield it properly, the burner will be way more efficient.