Okay I've got one for you guys.

I picked up someone's old Tri-bike at the Goodwill for $10. It was completely repainted. Not a decal, headbadge or 80's paint scheme to be found. It's a hodge-podge of some pretty decent parts (Sugino crankset, newer dia-compe brakes, Higher end Shimano derailleurs). After I little forum sleuthing I'm pretty settled on it being a Dave Scott Ironman. Lugging, dropouts, geometry all look the same. It even has that little "nipple" on the fork tube that I've only seen on these bikes.

Problem is, the serial number (N4E7891) dates it as an '84. From what I've seen the earlier Ironman bikes lack this little nipple on the fork tube. The earliest resemblance I've seen was an '86 bike. Now this bike very well could be an '85 model year, but from the serial number, '86 would be stretching it.

Opinions? I'll try to get a picture of the area I'm talking about.