@gunrunnerjohn posted:After some measurements with O72 curves and the limits of the wheel slop, I've decided to remove 1.25mm from the inside of the wheels an put a very slight chamfer on the inner edge of the wheel. That still allows margin to prevent the wheels from falling off the rail in a turn in either direction and looks like it allows sufficient clearance for the switch rail.
I'm still going to fix my switches to eliminate this issue, but I have to fix this locomotive anyway.
That’s all it takes John,...I fixed my son’s 3rd rail with the exact same issue,...you’ll see it’s not a lot that’s needed,.....and I did exactly what you mentioned, ....I set it up with an O72 piece of track to keep the contact patch on the rail,.....obviously a lathe yields the cleanest results, but I’d surmise with patience, you could obtain the same results chucking up the axle in a drill press and holding light pressure with either a jeweler’s file, or even emery cloth,.....ain’t like you’re cleaning up carbide or case hardened steel,...😉
Pat
