DiadDude,
My friend, you above statement has made it blatantly obvious that didn't drive for any length of time.
I deliver to a lot of aparments, and each stop requires a signature. So when I approach the door with 2 packages that I fit in 1 hand (managable only for few moments mind you). On route to the door I scan each package and put the DIAD back in my pouch. Now I can carry the 2 packages with 2 hands.
Next I ring the bell and (hopefully) the tennant is home. Here is what I want to do, DiadDude: I just want to take the Diad out of my pouch and hand it to the customer for him to sign. I can't because the customer can't find the pen.
So now I have to do what DiadDude suggests. I must put both packages down on the ground, take out the Diad, hand the pen to the customer, re-holster the Diad, and then pick-up the pakages and place them where the customes wants them.