Originally a Giant OCR2 frame but it was a bit on the small side so I found this online for sale secondhand. Guy didn't detail it was Columbus Airplane and carbon rear stays / fork so people weren't interested.
Lobbed the OCR parts on it, got some cheap secondhand Mavic Open Sports, (although heavier than standard as running Deore hubs with disc mounts).
Cheap Alivio rear mech and Retro brakes, (which I've T-Cut the name off) - but they don't weigh much more than modern Ultegra units to be honest.
Stem is a little long so currently shopping about for a 90-110 length, this one was carried over from my original bike.
The original Columbus sticker was a little damaged so ordered a replacement.
Previous owner even included the headset and carbon seatpost with the frame for an extra tenner.
Certainly not an expensive bike, looks more custom than the OCR2 did and cost me a hell-uva-lot less. Fit's me much better with the longer top-tube too.