I called Fernando at Earth and he told me that people were having big problems with the "A" model of replacement. I'm impressed that he didn't just sell one to me and let me sort it out, but actually gave me useful information!

So it appears that we want the "B" version, but no one has that, correct? So what about the "L" or the "G"? What is the difference? The fact that I'm even considering this is incredible to me (i'm a software guy, not a hardware guy) and when people start talking about cutting and shaving, I get really really scared!

The jury seems out on which to buy, or am I just not correctly reading between the lines?
--Mike