Thanks, zonatandem and Dean! We actually ended up trying it at 90 degrees, and ended up doing what you did, Dean. I don't know that either of us noticed a performance difference, but we did notice that the bike shifted much more easily with a more even power distribution, which is always a good thing. Starting actually wasn't anywhere near as difficult as I'd feared it would be--even when the butt pad of my shorts got caught on my seat after starting at a green light--and the biggest concern became cornering and making sure our pedals didn't scrape ground, curbs or speed bumps. Unfortunately, we weren't able to compare numbers due to the Garmin going screwy on us for about two miles. :-/