I just got home from REI with my new set of Timbuk2 Tandem panniers. First impressions are very good. Seem well designed , waterproof and comfortable. I think i got exactly what i was looking for.

I loaded them up and put them on my rack and went for a quick spin around the block.

Unbearable heel strike

I then remembered that someone mentioned they have an ability to angle backwards preventing said heel strike. The hook on the bottom that i had expected to hook to my rack actually swings up and clips on the back of the rack and like magic, the heel strike is gone.

genius.