I want to bump this thread because this sounds like something I want to try and have a few questions:

1) Will I need cone wrenches to move the spacers or do I just unscrew the nuts at each end of the axle?

2) What do I use for spacers?

3) How do you measure or gauge your chainline? I've never been sure with doing it by eye because of the lack of parallel lines on the bike as a guide. Do you calculate a center point on the axle and the BB and measure from there?

Thanks