Well worth the effort to save a lot of frustration, going on my own experience, and hopefully some kind soul will take it on.

The late Alan Stepney used to maintain a list of drawing errors on his website drawn from details submitted by various contributors. Although his website has disappeared since his passing an archived version can still be accessed at 'http://alanstepney.info/index.html', although no longer updated.

Thanks Jason; I wasn't aware of either of those.

Can I suggest some possible reasons for a supplier NOT correcting errors?

Drawings, including all errors, are copyright for 70 years after the author's death – so Martin Evans, LBSC, Don Young, Keith Wilson are all still in copyright. Even Henry Greenly's drawings have only gone out of copyright a couple of years ago, and if they were redraw by his daughter they are probably still copyright.

An error on a model may be down to the builder, so if only a few people complain a supplier may not be certain whether the error is real.

The supplier may not have the expertise to correct the drawing – eg a classic – LBSC's 'Maid of Kent' valve gear. K.N. Harris and Don Young both published modifications – which to choose??

It would not affect copyright or need anything special to include a simple A4 sheet with the bundle od drawings listing any errors etc that had shown up over the years.

Or as most suppliers have a web site why not a section on there much like this

Edited By JasonB on 15/03/2019 15:27:42

It's thoroughly worthwhile to advocate a collection of errors on drawings yet there's the inevitable "but".
It's been tried many times before with varying degrees of success ~ ultimately though none has survived to become the definitive source.
One which began with great support and still contains a vast amount of information was on Model Eng Clearing House (M.E. Proboards). http://modeleng.proboards.com/
A search there for "errors on drawings" shows some of the postings:-
**LINK**

It really is a treasure trove of information and enlightenment on just how many errors on popular drawings have been identified over the years. I compiled a detail list of errors found on a certain hot air engine and notified the author. He replied that the errors would be corrected on the next print but as far as I'm aware they never were. There were however posted on the M.E. Clearing House Errors Pages.
Martin Evans (a.k.a. Martin Errors) was not alone in publishing designs full of errors and omissions as perusal of those pages will reveal.