Thoughts on the "tender powered" engines.

I was not entirely correct. Until seeing Chris' photo, I forgot the driving wheels were normal sized and not the medium (?) diameter used on regular Molly (which would need some drilling to fit powered wheels unless they're TrackMaster 2). Not only does she have a bigger cab, wider firebox and shorter boiler to fit the components, but all of her wheelsets had to be aligned further ahead. The only time I recall seeing both together was in this video, and that's where the RC one (kinda) falls apart: