Hello Tom first of all I would like to say that you have done a great job so far. So now to the problems you have. It's my personal opinion! I am still firmly convinced that things can always be solved diplomatically if you are willing to do so. I've already read a lot of logs and can only say that the model builder will always encounter errors, regardless of whether they are hiding in the plan or whether the parts are not precisely manufactured. In your case it might be both, but you have been offered a solution to replace the faulty parts. I believe that we are a community, kit makers and model makers and we benefit from each other. Nobody is perfect, we can find very strong anomalies even in very expensive monographs of well-known authors, nevertheless model makers managed to create wonderful models. What I mean is we are creative and can fix these bugs even talk to the authors and makers and find solutions. As far as your comparison with the electrical item is concerned, this is very far-fetched, sorry, if you buy an item and it shows defects, the manufacturer always has the right to repair it up to three times before replacing it. So what I want to say is we all learn from each other and should respect each other and find solutions.