Can anyone tell how to quickly put a Digitrax 9-pin decoder in a 4-8-4 Northern and 4-6-6-4 Challenger. I open then tenders and could not gently disconnect the 9-pin already in there. Has anyone else put a 9-pin decoder in these locomotives or has everyone else just scrapped their existing DCC decoders and put a tsunami dcc/sound decoder in. Digitrax says that a DH123D will work and should be easy to replace. But as you can read I am on hearing asking this question so apparently it's not that easy. Please don't mention sodering I'm not very good at it.
thanks for any help
thanks for any help