I presently have an adjustable office chair. I had to take the wheels off and put it at its lowest setting and still have to stoop a bit to aim. I also put the shortest director's chair I had in there & it works ok. I would like to be able to use a regular office chair like I have in my other blind. It is so much more comfortable.
I found a picture of my trailer blind:
I think I may just make the windows taller & go with the Deerview Camo Hinge Windows to replace the present shorter ones. For a rifle rest, I can carpet a piece of 4X4 the width of the windows and set it in place while hunting.
I don't want to have to do any major changes to the exterior metal. That would add joints and possible leaks. It stays dry right now.
Thanks for all the input. I'm still open for anything that would be easier.