The Lemond probably feels bigger due to the longer top tube, likely longer stem, and likely more saddle to bar drop. All will increase the reach.

I learned my lesson with loose shifter screws the other day myself on the Gazelle. Couldn't get the shifting right, kept over shifting on the high end when I had the low end dialed in perfect. Ended up it was the loose shifter causing the problems. Now that's the first thing I check when shifting starts feeling sloppy.

Great looking rig, hope my Schwinn ends up even close to being as nice when it's finished in a few days.