This is a two question post. I have a pair of Speedplay's on my road bike now. It is the first and only clipless pedal I've used. I've had plantar fasciitis in my right foot for almost two years and only lately is it healing to where I can cross train and run. I've wondered if the small surface area of the Speedplays might exacerbate the injury now that riding season is around the corner. Also, I've rebuilt an old road bike so I'd like to get a pair of new clipless pedals for my "nice" ride and transfer the Speedplay's to the other bike. I'm a little concerned about the amount of float on other pedals and don't want my knees to suffer. So my question is are other pedals more comfortable since they have a larger surface area to distribute the pressure on the foot or does the stiff sole on my Sidi's kinda negate this? Also, how critical is it to get the cleat right on non-Speedplay pedals so one doesn't injure the knees. Most don't have that much float. Thanks.