Thanks for all the replies...

As to where my hands are going, that's WHY I posted this. I'm usually riding for 2 hours and my hands start to go numb after awhile. That secondary placement is just to alleviate the numbness but half of my ride is through heavy traffic and/or 90deg hedged/walled driveways. By having a second set of levers already in place I wouldn't have to worry about that split second lost by repositioning my hands for the brakes.