I suppose that is what I will have to do. But it will have to wait until after I finish my Ayesha II project. I have searched quite a bit over the last 2 years, and only found a few entries for Petrolea. I understand that one individual had quite a site dealing with drawing errors, but I understand it is long gone.
Your suggestion about using "Fusion" and just doing it myself is an excellent one, and what I will probably eventually do.
I am glad I started with "Ayesha II" by Tony Weale, as so far I have not found any errors, and everything has gone to print. The set of plans if beautifully done. Also, his articles deal with every significant issue that one might run into. I could not recommend "Ayesha II" more highly, both as a historical project, and as a first project for a beginner.
My main issue is with the suppliers. Over the years, they certainly should have had time to make corrections as they became known. I understand that LBSC and other modelers were working in a much different time, and that there was a HUGE variation in workshop equipment. I am still reading about treadle lathes, which were widely used when these designs came out. Many people did not even have a micrometer to work with. That situation was very similar to what existed here in the U.S. at the same time. It was the depression, and no one had money to spend freely on locomotive projects. That these intricate projects even existed at the time is mind-boggling to me. Also, EVERYONE makes mistakes, (including myself). The point is the length of time it takes to get them corrected.
I will turn in my first corrections for LBSC's "Jenny Lind" when they are done. I don't want to just complain. I want to see actual change. Also, I want to see the information freely available, so that not everyone who takes on a project has to stumble through the same ancient obstacles.
Thanks for your feedback. I will look into taking a local course on CAD and see how much I can pick up.