Perhaps you could be so kind as to point a few out for a novice. I have the Model Railroader book "Maintaining and Repairing your scale model trains" but that is about it. I have found it useful but wold like more information. For example I tried to adjust the gage on my Bachmann N Consolidated's tender wheels, but after removing the wheel from the tender twisting did no good and they wouldn't budge. Examples from knowledgeable people like you could be kept on this web site by engine model for all to read. An example my be the discussion on the Bachmann 4-6-0, very useful. Thanks, ignorant but not stupid, Mark