Well, I switched out the stock tuners on the Santana SE for Grover locking tuners, and then restrung with the Rev. Willy's .008 set. I had a couple of problems along the way---I put a bad kink in the High E string and had to ditch it for a single D'Addario plain steel .008 string that I had a couple of. Good thing, too, because when I was tightening it up to pitch, I apparently overshot "E" by a longshot because I ended up snapping the string. The 3rd one I tried went on without a hitch. I also went ahead and substituted a D'Addario .014 plain steel single for the set's .012 G string.
My first impressions of playing .008's for the first time in 29 years of playing: It was very strange. The A string (.030) seems too thin. So does the D string (.020)---very much so. The .014 G string had me wishing that I'd gone with a .015. Finally, the high E string is just pretty ridiculously thin.
I'm seriously considering switching back to .009's.