Hi everyone,
when I have spoken to UK based Hornby guys they all say the same thing - use the correct factory transformer for pre war loco,s . Many will say the MTH Z 4000 is great etc but that is what the Uk guys say - Hornby !
The other thing old windings are temperamental at best and if you are patient with an older loco it will remember electrickery like it used to . You may jag a good used strong pulling loco but that’s rare for something of 80 yr,s plus . Yes , a good 20 volt motor will pull 4-6 cars with ease . Get yours rewound and it won’t use 20 plus volts . At least with old engineering you can fix it rather than throw it away . Good on you for buying the piece , don’t give up . Fix tricks ! 🏆