Bicycle Mechanics - Adjust cantilevers on 27" to work on 700c?

My own post about my Schwinn Voyageur rebuild got me thinking. As I said their I would like to have made it a fixed gear, but I like the heavy duty 27" wheels. However, if I wanted to try it, could I stick my 700c fixed gear wheel on, and just adjust the cantilever brakes accordingly? I know it is doable because I did, and it seemed fine. But just because you CAN do something doesn't necessarily mean it is a good idea. Is there any inherent risk in doing this? I could just go with a front brake since I can do thre rear wheel stopping with the pedals. I'm still not comfortable with that setup. Any thoughts?

i have 700c wheels on my fixie, which was designed for 27".

no significant problems as of yet (maybe two months later?)

I can run 700c or 27" on one of my bikes, but just check you can adjust the brake pad position enough.

I can just barely touch the rims on my fixed-gear (Panasonic light touring frame) with 700c rims, built for 27", only on the front, and that's with an aftermarket caliper-the cantilever bosses won't allow cantilevers to work.

Originally posted by D*Alex
...the cantilever bosses won't allow cantilevers to work.

Interesting. These old DiaCompes are the old kind that take non-threaded pads. There is so much adjustment available in the in/out and up/down swivel of the clamp I could probably make it work with a 26" wheel though the angle of the arms would not be the optimal parallel-to-ground position when the pads contact. The newer Avid Shorties on my other commuter definitely don't have nearly the adjustment range these old DiaCompes do.