I was able to get my hands on an older Dupraz D1 last year for the purposes of an annual masochistic bump endurance event. I mounted it up and took it out yesterday for a test run. My first 30 yards were an adventure in squirrellyness that I chalked up to it's being shorter and less torsionally stiff than my other boards. After about a half run, I got used to its unique characteristics and was able to carve pretty clean turns on less steep sections. It did fine in the bumps and the crusty, windblown, tracked out, ungroomed edges. When I got home, I stacked it base-to-base with a Tanker for storage and I'll be danged if I couldn't see light between the two bases at the edges, like the Dupraz was smiling at me. I took a scraper and laid it against the base and there's about a 1-2mm gap at each edge, like a boat hull. Looks even worse with the scraper on the top sheet. I'm sure this shape is not intentional and not some forward-thinking, powder board feature.
Not sure I'm going to do anything about it since a grind would cost as much as the board did, it would probably mow through all of the available base material and I'm planning on using it in rocky bumps but I thought I'd share it in case anyone had some insights into how this might have happened. Maybe it was stored in a sauna? Perhaps it was deflecting all of the radness I was applying? Maybe it's just what happens to a Dupraz after a while?
And yes, gentle readers, that is a professional grade Helene Curtis Empress hair dryer in the background. The secret to how I get such amazing volume in my coiffure when it's not being mashed by my helmet.