I've got an Actionbent Manta Ray LWB bent, and I like it a lot, but about two weeks ago the aluminum backrest frame snapped just to the left of the bottom mount. I had it welded, and it was fine until today, when the right side broke. I'm thinking I need a better frame made of a stronger aluminum. I've checked some online, and I emailed Actionbent when the first break happened (no response), but haven't found a seat frame. Any recommendations?