`    Hi there!  Yeah, it's because I'm not knowledgeable on the best formats for WP  -).  I  settled for the format that preserved the most resolution.  I think the then-current version that I modified was a pixel-like format, so I made the modifications with pixels and saved it in a pixel-like, non-vector format.  And, the least lossy I knew of was tif.  It was important to make the corrections (like center of mass location, etc), and improve clarity (like adding the north pole), and also to make things more up to date (like getting rid of that asteroid-like counterweight).  I made the improvements and put them in the best format I could figure out.  I was also confused on how to make it as a modification in a sequence from the original, and as to the best place to put it in the WP universe, and so on.  Anyway, I was generally confused!  At least I got something correct and good posted to the English WP, even if the format wasn't optimal.  Other-language WPs still have the out-of-date misleading diagrams (with the asteroid, etc.).  I would love to get those fixed with this diagram in other languages.  I once saw a version on WP of the out-of-date diagram that somehow had blank spaces where the words go where different languages could be filled in.  The problem with that was that 1) I didn't know how to ``make it work``, 2) I only know one language (English I think), and 3) it was the old, incorrect diagram.  I'm very satisfied with this particular diagram itself.  I've actually seen it reused in many places and presentations.  One guy used it in a presentation at the Space Elevator Conference in Seattle in 2011.  I perked up when I saw it, and when I told him later that it was ``my``** diagram, he told me he picked it because it was the most accurate diagram he found on the internet.  If you are interested in making the diagram more universal or improving it in other ways, that'd be great!       (**Not really ``mine`` of course, but I felt some pride at having put the most recent work into it.)`