Hi, I'm Buddy and I'm also an MSOG junky... This is my first day at M.S.O.G.A.I'm 45 and still looking to pop 2 sometimes 3 times in an hour session. I too am always looking for the elusive BBBJTC or CFS for the first pop, then for the 2nd (or 3rd) pop BBBJTC or CFS. I've had some luck, like recently with Thai Maria, Kazumi, and a while back Chinese Kitty. Especially Kitty - she would get my motor going so good sometimes, I'd cum 4 times within an hour without a problem. I haven't had much luck lately though, but I'm sure I'll find a new favorite out there at some point.
The Red Book community isn't perfect, but I'm glad it exists. But researching the board for what I'm looking for can be hit or miss. Mainly because reviewers and topic posters throw around the term RBGFE very loosely. They'll describe an RA as RBGFE when the fact is the RA is really only GFE or KGFE. But because they had such a great time (perceived special connection or PSE) with the RA, they feel that she deserves the label RBGFE. Everyone's interpretation of acronyms and terms on RB are no doubt different. However, my interpretation of the "experience" terms are as follows:
GFE: You feel a genuine or perceived connection with her (like a girlfriend). In addition, she provides: DFK, BBBJ/CBJ, FS, but rarely MSOG. This is the baseline minimum, anything less than this and you should probably stay home and save yourself $200 by taking care of yourself (unless of course you're into f'ing a starfish or corpses...)
KGFE: baseline GFE, BBBJ/CBJ plus DATY, rimming and sometimes one MSOG by HJ or BJ, but 99% of the time 2nd pop is not by FS.
RBGFE: baseline GFE and KGFE, plus BBBJ and as many MSOG as you can handle in an hour, and by whatever method you prefer. RBGFE is reserved for the cream of the crop of RAs. An RBGFE RA will do anything and is determined, in that 1 hour period, to get you off however many times you can handle, until you are completely satisfied and drained. When you walk out of that apartment, your legs are wobbly. To put it simply, her volume dial goes to 11. See the movie Spinal Tap as a reference 
Bottom line is I've seen a lot of supposed "RBGFE" RA's who are really just GFE or KGFE - but were reviewed as RBGFE by some junior and senior members alike. Don't get me wrong, reviews are sometimes useful in weeding out the starfish and corpses, but I just don't put much faith in their accuracy - and that's too bad because RB's number one asset are the reviews. As I said, RB isn't perfect, but I am glad it exists.
I totally understand that YMMV with each RA, but when it comes to RBGFE level RA's, multiple MSOGs are always on the menu.
Just my .02...