Carlisle got the 6 wheel tender when it was rebuilt at Wolverhampton in 1924. It had a new but identical boiler fitted from Kitsons. It was the last loco rebuilt at Wolverhampton and they were determined to make a good job of it. The 4 wheel tender was so poor that they found a better one on the scrap line and substituted it for the four wheel one. It was slightly wider and a bit lower than the original. They said that Swindon would never realise the tenders were swapped as long as the number of tenders to be broken up remained the same. The story is told in one of Holcroft's books.
The kit has its limitations but is probably good enough. The tender top had the water filler in a horseshoe shaped casing, as per LNWR, butting up to the spacer to keep the coal at the back. It had a dustbin lid type top to the circular water filler. In its last few months Carlisle was repainted in black from GWR green I was told by the late Ken Lucas who often rode on the footplate as a boy. The copper capped chimney and brass safety valve cover are GWR types. Better ones in brass and copper are available from David Geen who supplies them with his 517 kits I think. I too have a part built one. It took rather a lot of fiddling to do and the picture on the front of the box is actually of my part built model! I too asked Trevor for a four wheel tender and suggested he put the tender on a separate etch as it would have sold separately to GWR modellers. If you have any missing etches contact him - I've always found him very helpful. My chassis was nickel silver, as were the rods.
regards,
Albyn