Hello Paul and Phill. Thanks for your comments . I have idly contacted Hobby Craft and the Heritage Railways . Apart from the Ongar and Epping Railway ,who have been great , they were generally uninterested . This is pretty common with most new and "out of the box " products . I could easily conclude that I am wasting my time , if it wasnt for the fact that everytime I have shown one of these models to a member of the public , they have been totally bowled over . I did show them at two model railway exhibitions for feedback, I probably could have sold some there and then if I'd had some in nice glossy boxes .(which they will have ) .
When and if the lockdown is over, I will simply take them to some more of the shows to get some out there and then market direct , which is what I had to do for my aircraft kits . I am amazed that the GWR at Didcot dismissed it as "taking up too much room in their shop " . But there it is .
Regarding Phils questions on methodology , this item probably shouldnt be on this forum because as real engineers , you are all going to want to turn it into a proper metal train . This is quite another tack and as a later spin off has crossed my mind . To that end I have made an equivalent model from resin which could be fitted with bushes and metal work for just the most vital areas in order to reduce cost . I know from my scale aircraft background that you can make wooden aircraft looked like they are made of aluminium , to the point where people come and tap on my Spitfires , so it follows you can make other stuff look and feel like painted steel and iron , If I just wanted to break into garden gauge railways , I would have simply made large scale coaches , which for us is pretty straightforward . Size is not a problem as we have made display model airliners with over twenty foot span wings as commission work . I am really aiming for the people who would like to make something really impressive but do not have a workshop full of tools , let alone lathes and milling machines . There are thousands out there who used to be creative but now , living in a flat, makes that impossible . Also , what do families buy Dad or Grandad when he retires ? Socks ? A lawnmower ? These kits are ideal .
Something along these lines is far more impressive and rewarding , and if you like the Hall Class , why not the Tornado next?
If you google" large Display loco" , you get Ochre (lovely but lots of skill required and not as big ) and U gears , clever but skeletal and unpleasant to look at .
Small well equipped British Companies can avoid competition with the Chinese , by communicating directly with the customer base and then rapidly doing smaller runs that are tailored to the UK market . The problem for this product is finding the forum . When you think about it , can you ever imagine the Chinese putting all this development into something so essentially British ? If it was an American Subject , well….
I do value all of your opinions because I come from the same background , but there are many more out there who didnt, but still want to follow with the rewarding sensation of problem solving and creation . I am trying to give them that reward without years of experience and a garage full of machinery 
Keep the comments coming , I'm fascinated by peoples views , good and bad . ( Anyway , whats bad?)