I know this is pretty miner compared to what some of you guys are doing, but I final put the scale pilots on my Atlas Lackawanna F3s. These are Kadee couplers and Kadee gear boxes. The stock Atlas scale couplers and gear boxes. The Atlas ones are actually to low when you check it with the coupler gauge. The stock rear Atlas couplers were the right height though. Thanks Mario for getting me started on that slippery slope. Now only hundreds more to modify.