That's a lovely model you have made there Peter, I for one can appreciate the amount of work put into that, perhaps a couple of pictures of my tender would be of interest.
A view from the rear, the tender is nearly finished, a few more small bits to add and of course painting and lining.
and a view from the front, as with the loco when finished everything seen is working except for the scoop which for safety reasons is a dummy. The handbrake is fully functional, as are the two water valves to the injectors (one is sitting high as it's not currently located into the water valve below). The water gauge with it's row of holes to show the level of the water in the tender also functions as per prototype. The brakes are as per prototype too with two vacuum cylinders giving auto-vacuum control so that if the loco comes loose from the tender all brakes are fully applied. This will apply to the loco, the tender and any working carriages behind as long as they are vacuum controlled as the vacuum hose connections are fully operational for both tender and loco. All doors and lockets work and when I have finished researching the tools required the lockers will be equipped with all the 'LNER' tools of the day, they will also have white interiors and wooden pallets on the floor, again as per prototype.
I have used some modellers license when choosing which tender to use, FS never had this 'high sided' tender, for my chosen era (1939) she had a streamlined tender, I have however, used the correct number (5640). The two tenders are close in appearance, however I needed to give some thought to being able to steam the model when having a fully scaled tender front, thus having no 'removable' front section. Also the streamlined tenders had the added section to the top of the coal wall which brought it up to the cab roof, If I had that I wouldn't be able to reach the controls in the cab, which has a scaled removable rear section for steaming. One other change, I fitted the later water vents which fit under the fairing instead of the 'hooked' type that sat proud of the coal wall, again this is to help with steaming the model. The other big reason is cosmetic appearance, with this high sided type tender I have matching loco and tender curved side sheets and beading, a very pretty combination.
I think that covers most things, feel free to ask any questions, I have been studying this class for over 20 years now and still pick up new bits of info here and there, I like to think, that I know this class and in particular 4472 very well now...
cheers
Pete