Hello from Bucks County Pennsylvania USA. I bought a 1983 GL650 Silverwing Interstate in somewhat cosmetically shabby but mechanically sound shape back in March and have been riding and fixing it up since. Here is a pic:

Added highway pegs, rebuilt seat with gel insert and new cover, scraped and painted rusty spots on frame, changed fork oil to 20wt, changed all fluids and adjusted valves, balanced carbs, lubed cables, replaced grips, repaired broken fairing, re-routed cables and wires to proper locations, hard wired stator, greased splines on rear drive, etc. etc. and have ridden it nearly 2000 miles since March 15.
Thanks to all who have contributed to the online CX/GL community and so generously shared their knowledge.