Now thats an awesome idea Nigels and one that is much needed for the older Plarail Battery tender engines as those covers keep getting lost or broken in kids toy boxes. Now all you need is to make programs for a Henry, Gordon and Edward tender coal cover as I think they are all different.
Excellent idea and work Nigels. I would imagine there would be a market for them if you sold them in a set with one of each for the Thomas lovers. There are also tender covers that are missing for the western type Japanese steamers like the Yoshitsune and Benkai. You see many of those engines listed on the Japan auctions with no covers mostly due the the covers not snapping into place and they easily pop off.
I always assumed that all the Tender battery covers were different for each character but I am certainly no expert there and I no longer have any to compare to.
As far as a relevant place to List your wares, I would think that the Trading Zone would be perfect for just Members if you weren't going full blown mass production for the public.
I think the whether the tender cover actually fits on other engines solely depends on the year the engines were manufactured. The tender size is the same for Gordon James and Henery really.
I want to say that the cover for Henry’s tender was different but Gordon’s and James’s were pretty much interchangeable. To be honest, I got tired of dealing with broken wires on my kids’ engines and replaced them with later versions that had the battery under the boiler.