Oh yeah - I forgot to mention that those folks who believe they need an axle retainer (what's the term these days, chain tug?) probably believe they only work with rear-loading track ends. My primary fixed-gear riding partner uses one of the BMX variety on the stamped horizontal dropouts on the in-period, but not particularly lightweight Schwinn he uses for rough stuff. Those dropouts, btw, aren't too far away from the older stamped British units on my '62 Dawes.
Now, if someone would just bring back the old Cyclo units pictured in R. John Way's book from about 1952 or so - designed for long horizontal dropouts. I think someone actually posted a pic of such a unit to this list, but that was years ago.
Russ Fitzgerald
Greenwood, SC, USA
http://internaldetours.blogspot.com