Hey, I have a DriRider tank bag which is pretty convenient but gets in the way while riding. Not seriously in the way, just more in my head. I feel less engaged with the machine. I've seen bike specific backpacks, and other luggage options, usually strapped to the back of the bike. For anyone with a backpack - how do you find it? Is it comfortable for multiple hour rides? Why did you go with a bike-specific backpack rather than a normal one? And for the rear-luggage options (I'm not really keen on saddlebags) - does it interfere with lane splitting or cause noticeable aerodynamic drag? Any recommendations for luggage options other than a tank bag? Thanks.