Good grief guys, remember the DB7 is an Eye-Talian SPORTbike and follows in the long and well established tradition of all such creatures: i.e. the mirrors are worthless. As Raul Julia said when playing the Italian racing driver in GUMBALL RALLY and jumping into the Ferrari Daytona Spyder and tearing off the rearview mirror, "Firsta rule of Italian driving, whatsa behind me is of no importance." Use the long established method of lane changing and merging for all Italian sportbikes, look over to your left or right and then twist the wick as hard as you can to outrun whatever may be coming up behind or alongside of you -- and pray
Curiously, this rule does not apply to Italian naked bikes, the mirrors on my DB6R work beautifully. Of course that exception to the rule is not universal, as the idiotic bar end folding mirrors on the Ducati Hypermotard as as worthless as teats on a bull elephant.
Dave