some years ago, I obtained one, 'new' for a couple of quids, shop-soiled, in the red and yellow/blue of Hornby's old toy train range.....same loco, different colours.
I did intend modifying to represent the 06.....it runs quite well, still.....even though it weighs little.....I wondered how much weight could be added, for traction and track-holding, without over-stressing the little can motor?
also....since the prototype 06 had a jackshaft drive..with the jackshaft conveniently hidden behind the cab steps.....has anybody tried removing the side rods, and soldering an extension on the 'cab' end?
this possibly doesn't even need to be attached to a moving jackshaft.....[no worse than Hornby's apparently acceptable lack of hinged motion on its 4 wheel steamers????].....since IF the steps were partially sheeted-in behind [health and safety??].....lack of whirling bits may not be noticed....
just a thought?