Unfortunately, I am in the a shame is it not better camp. Having seen samples at shows I was not expecting much. I was hoping for much better. Very disappointing. It just looks wrong from many angles. I believe the shape of the old Bachmann model is better.
In fairness to GWR modellers I will concede that Panniers do not look like 4-6-0s. However I still do not subscribe to the theory that there was more than one type of 4-6-0 or indeed more than one type of Pannier. Crazy talk🤪
For what it's worth I always believed that the bang plate was the grid and this was a long time ago. It was much later in the 90s when I heard people saying the horn grille was the inspiration for the name.
The bang plate always made more sense as it was actually a grid.
Looking at notes here I have one example was 17097 which is a 2A. There were not that many 2B BFKs so I would guess that 2As were more common. There were 48 x 2A BFKs but just 9 x 2Bs.
Edit: Just seen apollo 079's post above, so no 2B BFKs.
TSO, TSO, TSO, BFK, TSOT, BFK, TSO, TSO, TSO, was indeed the most common configuration. Occasionally an FK could replace a BFK but it was generally as you mentioned. I believe there were 5 such rakes.
That is pretty well know. At the time it was the heaviest item ever carried by air. It was later beaten by a generator of some sort. That is not an A cliass as you no doubt know.
Other manufacturers have the same issue too. Just go with the manufacturers recommendation. High end DCC models are very complex with lots of extra features. Beyond the standard functionality of the DCC standard you cannot expect manufacturers to try every permutation of chip availabe to in order to access extended bespoke features of every given model.