Has anyone ever converted a bike to a fixed for just a month or so? I was wondering if I could buy just a new chain and a thread on cog and a lock ring. I could leave on the front derailleur, put a strap around the levers to make sure they don't get budged, tie back the rear derailleur to keep it out of the way, and install a new short chain. The chain line from the small chainring to the thread on cog would be about straight and in theory I would then be ready for fixed riding for a month or so. I could easily convert back after I iron out a few pedaling issues on my trainer and on the road. Is there something wrong with this plan?

Garth