It is for this very reason that I have opted to purchase a set of drawings. Yes, they are expensive, but to maintain your sanity and keep your blood pressure down I think it is cheap. I can assure you, that having made a loco from magazine published drawings it will not take you long to realise that it is a worthwhile expenditure. It will not only save you money in scrapped components, but a more precious commodity time. No, I do not have any connection with the drawing supplier other than as a customer.
Nick whilst I go along with your ‘errata’ page, the end of the series will be for a few constructors, a bit to late.I do not include myself in that, but from reading these posts quite a few are keeping up with the series. It is a good job that Ray is keeping an eye on things.