I also added some rod holders that I can take apart when I fold things up. I don't fish from them, but they come in handy so that I don't tangle my lines and have a place for extra rods that are ready to go. The end caps are permanently mounted to the floor, and the pvc pulls out so that I can fold the shanty when I'm ready to leave. I leaned the caps in ever so slightly to keep the poles off of the side wall of the canvas, but not so far as to bother me when I'm sitting and fishing.
I also added a light with a switch to one of the plastic crossmembers that add headroom to the shack.
All of these mods were easy, inexpensive, and took a little time, but they all make everything just a little bit better.
Have fun! Hope that I helped!