My door thermo is close enough to the ET-732 for me to not worry about it.
I use a cast iron skillet on top of the original pan with chunks of wood.
There is another forum about smoking meat that has a whole section on gas smokers and there are some threads in it about modding the XL.
Overall, I like it. Almost set and forget once it is dialed in. I do wish it had a separate door for adding wood though.