Awesome job! I tracked the song originally in drop Bb and used the low open Bb and C for the last 2 chords on the studio recording. The songs seems to sound good in drop C as well though! It might even have a more epic feel with playing the last 2 chords in the higher octave. :)
Thanks for watching! I didn't down tune my guitar, I just used an effect on my Helix called poly capo to lower the pitch of the signal. I learned it by ear so it might be different. Your the man