Sorry pressed post reply too soon!
Next I fitted replacement buffer beams ( one set from a lima 31 or Airfix 31 and the other scratch built from plasticard and some parts from an old Airfix steam loco kit) , then made some cab floors from plasticard( 0.060") and glued them in place so they were flush with the bottom of the bodywork. I cut a slight crescent/ vee in the back edge to clear the bogie when it swings .Then I fitted NEM pockets on an upstand made from plasticard shims , adjusted to get the coupling height correct.
The item shown is from a coach I dismantled but the coupling parts were useful as it saved the number if shims/ packers needed to bring the height correct.
Of course , the coupling no longer swings, but I have quite gentle curves so it's not a problem so far.
Photo shows my crude but effective method of setting the coupler height.
View attachment 79036View attachment 79038
The lights are no more, but I'm sure they could be reconnected if you were keen.
Anyway hope that's of interest and might save someone throwing away what is otherwise a good loco.
Picture shows what happened to the Airfix 31 which donated it's beam! Ouch....