Ben Woodhouse

Hello, I'm enquiring about how to go about replacing the damaged live coupling that connects the 2 DMU's on my Arriva Trains Class 150 by Bachmann, the coupling works the front and rear lighting system. I believe the whole coupling system needs replacing. The 2 car set is a limited edition weathered model that i'm preparing for sale so am eager to get the couplings done. I'm unable to find the exact coupling in replacement parts online etc. So was wondering if anybody knew of the such coupling, and/or how to go about the replacement process. I'm open to further questions about the details of the couplings or the DMU - and if anybody is interested in making an offer since I intend on selling. Many Thanks