My wife... the better half of the equation told me she has found the best rail checker going. The Kato C44-9W running on the tracks seems to find anything that is wrong. We have found and repaired 3 sections where somehow the rails got pinched just a wee bit.... call it sloppy work, or what ever, but this loco seems to find anyplace you have a problem. So besides looking good and running good it will find all of the nasty surprises on your layout.
Art
Art