Much to my delight Himself has got straight on with the task of fitting the replacement wheelsets to our Welsh Pony in the hope of curing it's limp.
To do that he's had to strip the chassis and has removed the brass discs which were glued onto the plastic wheel centres to transplant them onto the new ones.
In the picture you can see that two of them have already been fixed and the others are setting with the aid of some hair clips to hold them in position.
There is no valve gear to deconstruct on an England engine, which is a good thing, but the main difficulty on this chassis is with the slide bars which have had to be bend by 90 degrees to remove the front wheels.
Attempting to remove the cylinder assembly would have risked the whole chassis falling apart, apparently.