Fly Doc...You're gonna have some problems with splitting the wing between both i/b and o/b engines.....a wing tube needs to be long enough to support the weight and aerdynamic forces on the o/b panel...you'll invariably be short changed due to retractable gear in the i/b nacelle aft towards the trailing edge.....you'd be better off picking up a used trailer to accomodate your new project.....Bill.......