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The three-axle conversion cars of the Deutsche Bundesbahn were coupled in pairs. If you want to couple the new gauge 1 models of the 3yge cars from Wunder close to prototype, you have to plan a little and procure suitable couplers. There are several solutions, which are presented here.

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A cohesive train appearance as with the prototype is a matter of nerves of steel with four-axle passenger cars on gauge 1. Even the fine motor skills of a surgeon won't get you far. But there are now practicable tools to solve these problems cleverly and to ensure an automatic connection of the cars.