I've had some Atlas couplers fail -- a couple from zinc pest and a couple with knuckle failure. I find that a Kadee 745 (plastic box) can be jockeyed onto an Atlas car using 2mmx8 screws and a single MicroMark shim. The coupler box will stick out from the end sill slightly, but will be at the right height. Kadee 700-series couplers are superior to the Atlas. If you want something better looking. you you have to go with ProtoCraft which work, but aren't really suitable for switching as they lock in pretty tight from what I've observed. I don't even bother trying to couple to hi-rail couplers -- I use transition cars
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