Hi, Recently I saw this blog post (http://www.hurlbutvisuals.com/blog/2014/04/kitting-out-your-movi/ ) and the extended roll arms, really caught my attention. I have been using my movi with an red Epic, and every time I want to use a mattebox it's a pain in the ass. I have a very light setup, so total weight is not a problem. My mattebox is a vocas 210 (very light, about 200g). But because of the short roll arms, the back of the camera hits the movi when balancing. So I have to start adding weight to the back of the camera to get it balanced (like putting the paralinx and the bfd receiver velcroed to the side of the camera. This worked with cp2 lenses, but on heavier lenses, having to add weight to the back of the camera, made me get to the weight limit of the rig. All I needed was about an extra inch or 2!! I guess a lot of people have a similar problem, and I don't see why freefly can't sell an upgrade kit for that. I contacted Freefly support and the answer was that this part was incorporated into the design of the m15 and that they wouldn't seel it separetely. I don't understand. If they can upgrade the pan knuckle and the cage design, why can't they sell this? Please!!!!