Anyone ever tried to shoehorn the RI front window into the rear roll cage opening on a newer Max IV? I was just mulling over ways to build a semi-permanent hard cab and get away from the canvas stuff. I've got a line on a durable section of HDPE for the roof that I plan to make removable via a lightwieght sub-frame that would utilize the stock RI roll cage fitment mounts for attachment. I figured that the RI windshield is probably the simplest way for the front window, since anything in plastics will either scratch up too easily or to get an acrylic that is truly scratch-proof would wind up consting as much as the glass unit from RI. For the rear, I considered a home-made job with double-wall plexiglass/lexan for added sound insulation, but it'd be a pain to fab and I'm not even sure it's the route I want for the back. I haven't taken measurments yet, but if the rear of the RI cage has the same dimensions as the front then the RI windshield could be used for either opening, with perhaps a bit of shortening for the back. Ideally, I'd like a rigid enclosure, similar to the old Chariot on "Lost In Space" but something I could conceivably unbolt & disconnect as a single unit from the RI roll cage and remove with a shop hoist or some such for warm weather riding. Even better, just be able to remove the "doors" so the top front & rear offered some protection for occupants. Just thinking out loud at this point...