It's an old photo
Join Date: Aug 2006
Bikes: Cannondale R500, Specialized Hardrock
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I did a combination of the two for the fixie conversion I built; added about 7mm of spacers, and bent the dropouts/rear triangle arbitrarily so that the rear wheel installed easily. Later I had my LBS check the alignment, and they said it was fine. Later as I was adjusting for chainline, I ended up with more spacers on one side, and now I only have few threads engaging on my drive-side track nut, which worries me a little.
So I recommend you skip the actual bending (especially because it's aluminum), and the peace-of-mind is absolutely worth it (I basically bought a new bike just so I'd feel safer with more 'solid', fixed-specific components). Measure your axle, the thickness of your dropouts, the track nuts, and calculate if you have enough room for spacers. If not, find a new axle. Do the job right, and make sure you can easily install the wheel with the correct alignment/chain tension.