Anyone shoot from a wheelchair?

One of my customers and I were talking today and he mentioned he was looking for 38 parts. My brain went to guns and i asked what .38 he has.

He said he is looking for 1938 ford parts.. but he has never shot a gun. (He is in a wheelchair) He expressed interest in shooting but said he has never had a chance.
We have been talking and we are going to the range on Thursday.

I have taken many first time shooters out but never someone in a chair.
Any advice to make his first time go well?

We will be working his way up from .22 pistol or rifle on up as far as he wants to go. I plan on bringing ALL the guns on this trip.