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I just read your request for info on AHM locos. I have been doing Kadee change overs on quite a few older talgo type engines and have found that there are two things to remember with the older engine trucks. One, be careful when you work on them and two, the lock that holds them together may break eventually if you have to try quite a few times to get the height correct. BUT, there is a way to fix them if you do break the lock's tab, it's simple and easy. I have even had the locks break on IHC's newer trucks, which I repaired this way. Anyway, this is one way that I have found that also works on these talgo trucks and that is to; 1) take the old coupler out 2) drill through the center of the stud the old coupler was mounted on 3) drill and tap it for 2-56 4) check the top of the assy. and file/sand flat if nessary 5) I have used both the # 5 box and also the box that has two ears and no cover (I forget the number of the package) 6) mount the coupler on TOP of the truck frame with the smallest headed machine screw you have going from the top down 7) you may or may not have to file the opening a bit, or the coupler cover, so there is no rubbing. Do enough so the coupler cover does not hit if the truck comes up when it hits a bit of a bump. I did it this way because I could not find any coupler or shim that got it to the correct height. I have also found on some engines and cars that each end took different coupler numbers and or shims so don't think you're seeing things. I have heard it, and read it, that you have to try until it fits. If you have a few to do, or plan to change over all your cars, I would suggest you do several things. If you need some more ideas on coupler change-overs, I would be glad to help. Ralph
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