FC=Full combo, meaning 100% and no extra strums, keeping a combo the whole song.
No I don't play real guitar, and no I don't want to. I have tried and I suck. I do play the drums though, and I have a video of me playing, and should have some more soon.
This is on hyperspeed 4, all of my guitar hero videos are.
This IS on expert, if you don't believe me try it yourself and show me the difference.
No there are no cheats being used (hyperspeed is on but it isn't really a cheat since scores still upload to the leaderboards with it on) and my score is on XBL.