I did not find a recent photo of my pewter U50, but here is the cast aluminum Squaw Creek. These are channels, pinned to the sides. Glue is needed for aluminum and pewter models - I prefer solder on brass and bronze, but am having such good success I may stick with this technique. Using 3M30-3N glue, which is almost identical to a water based contact cement now used to attach fabric to airframes.
