Thanks for the reply, mrasmm. I actually got the title of this thread right after reading the link you gave me! haha...

I just thought of another one: What's 3-in-1? I'm assuming this is referring to the mixer that has ESC, Gyro, and some other thingy on one board. If so, what's the fourth thing in 4-in-1? Is there a such thing as a 2-in-1 or a 1-in-1 (which I'm assuming would be referred to as "1" or just the name of the board)?

Thanks!