Finally was able to get a test ride of about 9 miles yesterday (planned for 20 but got rained out again!).

Got the 56 style cleats and installed them on the aft cleat position. Felt good and was able to unclip very easily. Cleats stayed in position without a problem. Only problem seems to be with my left foot, some pressure on the outside of my foot in the pedal region. May have to make some adjustment there.