I happen to think that's a beautiful bike. The owner has in no way damaged the frame be removing braze ons so I don't see a problem. Fixed gears can be lovely bikes. Thet distill the bicycle down to it's purest form. While I can't ride one where I'm at without a brake (too many hills) for those that live in a topography where you can it makes for the ultimate in uncluttered bike buildup. here's my beater Here's my beater fixie, which doesn't violate a frame anyone lusts after lol. Other brake levers on there for something to grab when climbing.
