#2
Only the songs or including solos?
For the first...a lot XD
Especially stuff like Whole Lotta Love...
But any other...I don't really know because I only study the songs in Open Tunings ^^;;
#3
stairway, but that is entirely too obvious
Gibson SG Standard
Ibanez S2170FB
Peavey JSX
Marshall 1960A
TEXAS A&M