Searched high and low for a photo of the J50 backside.
I have an article on detailing the Lima model with good photos of everything but the rear end. The text says he only replaced the lamp brackets with plasticard.
I found this photo of LMR 601 Kitchener with 68956 in the background.
This shows that there were no handrails. The two dots apear to be lamps.
Note also the NB style footboard under the bunker.
This photo shows 68927.
Both photos at Eastfield.
Shy creatures the J50s. The Eastfield ones shunted Cadder Yard.