I have a 4 gallon (18 months now ) --- I ended up buying two 12 gallon Cajun Jimmys from them for our men's club at church. ( we do fish Fries ). I have never fried a turkey in any of them, however when I ordered them I made sure to get the expanded metal grate that sits on top of the burner tube. They keep their temp awesome. One side note. I did use mine to crisp some wings I smoked. Wings were good, oil smelled bbq smokey for the next few cooks. No real boba taste to any of the fried food though.
I did start a Cajun fryer fan page on FB.