I'm loving this Thread! I'll get pics up soon.
Currently restoring a 1980 414 to original condition.
Also building an 84 500 frame set with donor shimano 600 from an 84 610 with a bent frame. Helicomatic and all.
For now my current ride is an 97 520 That my neighbor was throwing away. That one needed a lot of cleanup but turned out great. Pics to follow