Chris,
Oh no, you have thrown a curve to my thinking. After reading up I was quite convinced that the P was a better option for my wife. 1. it is smaller and easer to move around the house. 2. It is less of a step up.
I agree that that "I" would be better for outdoor use, but all and all I think she will use it indoors and on paved surfaces. I have not tried a "P" yet. I will see if I can find a place to demo it in the CA Bay Area. I am still leaning toward a P but I'll rethink the "I". Thanks for the input.
Roger
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