Craig, I removed the front bunk in mine (I notice that yours is also gone) and I also removed that large
fiberglass 'bump out' under the window. The hinge for the bumk was attached to it, and the bunk folded down against it . By removing the bump out, you will have a nice vertical wall under the window instead of the ledge. It was just a matter of removing the screws and 'muscling' it off the wall. I also had to loosen up the trim ring around the window and pull it out from underneath. There is an unfinished section of
fiberglass that will be exposed (just like the area on the ceiling). I just cover mine up with decorative pillows. I love the extra room !!