Space saving method for motorising Lego Steam Train

I was so excited when news emerged of the new Lego Steam Train set 60511. Such a great looking set, and promoting it as "Ready for PoweredUp" with official instructions is very welcome. It really is a golden moment for anyone to get into Lego trains, and there is no better way to add life to your Lego town or display. Having picked up and built the new Steam Train a few days ago, I'm going to push the boat out and say this little set is one of my Top 3 favourite trains Lego has ever released....