Somewhere along the way I have acquired a couple of those HO locos and adapted one with a Peco coupling on the tender to run with my Playcraft HO stock.I also have a couple of the class 33 diesels awaiting the coupling change and maybe conversion to class 26.
The weak point with these locos, as with the Lima Crab and King is maintaining electrical continuity through the tender coupling. The arrangement provides an intermittent supply at best and if the metal gets too oxidised there will be no power flowing at all. I have done a bodge on one by soldering a wire between loco and tender and this results in fairly good runnnig most of the time.
A shame these weten’t made 00 but then again they wouldn’t stand up to today’s standards with centre wheels unconnected to the rods and fairly coarse body mouldings. The red LMS version looks nice but I think they were only ever in unlined blacK for the LMS and BR. Of interest is they also did an 0 gauge version of this loco which was later available as a battery powered engine, Tri-ang big-big train style. I think it was also available in a special zoo set with no tender at some point?