(insert metric sucks jokes here)
I would have went with, 'I meant to type 1320, but spaced and hit "7" instead of "2"' and no one would have been the wiser. Too late now though.
Besides, I have a laptop, physically impossible to screw it up that bad. And FWIW I own no inchical tools. Everything I have is metric, let me tell you how much of a pisser it was to find an allen key to fit the bolts for my flyscreen (Buell).
For sockets that are close, but not quite, a bit of rag over the bolt/nut will usually do the trick... that's what I did as a kid when I got my first bike (a Suzuki) and my dad only had SAE tools.