Unfortunately 44 ft sections of decoiled sheet are not available so the roof was divided into 3 sections with the two roof joins being elegantly dealt with as follows.
The sternmost joint was put above the engine room . Here the compound curve of the roof sheer and lateral camber in this area can be facilitated by the inclusion of the removable panel which also leaves only a short section of welded seam to show at each side between the removable panel and the handrail.
(This is described in a previous post).
The foremost joint was arranged to come half way along the roof and hidden by a strap with centre rope rings at each end. On a wooden cabin this would have been bolted on so Dave has included a few bolt heads. Consequently a useful and decorative feature has been created.
This is seen on the photos below.