I heard back from the factory re my rib 6/top skin issue. As I thought, the rib is the problem so that means disassembling the fuselage & de-riveting the rear section that I assembled in February - a bit of a set back. Hopefully the parts will be available to me soon but in the mean time I still have much I can get on with however work will once again interfere with the project over the next couple of weeks.