No problem - that is the strength of Wikipedia: collaboration! You don't have to get it perfect on your own. I have changed the tag to indicate that it lacks footnotes, rather than refs since you have added the refs. It is probably easier to add footnotes as an article is being written, rather than after the fact, which, as you point out would be a lot of work now. When I had the refs, such as in the case of V-Speeds I have been able to reference a list like this in the past retroactively, but I don't have the refs for this article. I think the article is very useful and I hope that it will be retained and expanded over time. Thanks for starting it! -