I just purchased a used Corbin and there are no cracks in that area on either side. It does have thin cracks in the paint on the underside and a very small crack above the left armrest. I hope the mods Phil made for me assist with support as it moved the center of gravity a little forward. Corbin customer service is HORRIBLE, let me repeat HORRIBLE. I refused to pay 900 due to that fact and took a chance on a used one. It is
very comfortable for my wife but knowing what I do now I would probably have had a local upholstery guy make me a custom backrest for the Give E55. I feel in the end I will end up going back to the Givi if mine develops these cracks as I will not put 500.00 in a restoration. Here is what mine has as well as the new position.