Single version of "Silver Springs"

[sweetdudejim]

Okay, so I've scoured the internet and I've never been able to definitively figure out what is the deal with the true single version of "Silver Springs" that was released as a b-side in 1977. From what I've been able to ascertain, it is either totally unavailable digitally (or is it?)

Anyways, let's go through what we have...

There's the 1977 b-side version.

Then there's the version released in 1992 on the 25 Years - The Chain. As far as song length, it seems like it has roughly the same playing time as the single version. However, is it the same mix? I've tried to compare my version for the box set, with a vinyl rip on YouTube. However, I'm just unsure due to the fidelity of listening to something on YouTube. So does anybody know if this is indeed the single mix?

In 2002 it was issued on The Very Best Of Fleetwood Mac. Which version was this? I see it's listed as "4:30" on iTunes so it's a shorter mix. But is the single mix or some remix? Anybody know?

Then we have the version released in 2004 and inserted into the tracklist of the original Rumours album. This version is obviously different as it has a different running time and is mixed differently.

Then there is the version released in 2013 on the latest Rumours reissue. Since I no longer have the 2004 edition, is this the 2013 version the same as the 2004 version?

And lastly, there's the version on Stevie's Crystal Visions compilation. I'm pretty this is the same mix as the 2004 Rumours reissue right?

I know this is a cluster, but I'm just trying to see if I indeed have a copy of the song as it was originally intended and not a latter day rethink.