To reply about the rubber for the windows
with me doing the side windows like the front and rear i did use all i had. but with me using it over the weekend the 7/8 rubber that i used for the plex. with rain all weekend long and a leak at front glass. i am thinking of going with a 1.3 in rubber and putting the two ends on the side and not on the bottom.
and Ben, for the shelf under the front window this was a bunk camper and when I striped it out I left the brace that scamp had there to hold the bunk. and I attached the shelf to that brace.
I will be working on the scamp this weekend and more pics to come. its camping season here and I have lots i want to get done.