Oh little update, When I crashed last week I didnt hit my back so the backpack is fine, but I honestly cant even remember it being on, I can barely feel it while i ride, even when its full of 30lbs of ****
I hit GMR with my backpack fully loaded and had no problem in a full lean with my knee out
Link to original page on YouTube.
Oh and a side note... I even had a dream about my backpack... I know I'm weird... But in my dream I thought I had lost my backpack but the whole time it was on my back lol (Like the glasses on your head thing lol)