That seems like a good design, very neat use of materials and the mounting system might not be as tight as some, but it looks really versatile. It will be harder to ship though, that is one disadvantage to porteurs. It would be relatively easy to make them removable flat somehow, but that cuts into the whole idea of their being one piece custom made and bombproof, it would really have to be well made to interlock with bolts and still have that custom feel.