This was linked to me by a friend, and I thought others here might enjoy a (scarce) read of a mainstream article about riding with a prosthesis.

http://www.velominati.com/racing/gue...t-of-pedaling/

I found out most of this through trial and error on my own. I have not yet shortened one crank arm, and with the pain in my lower back it is something I am considering....although there remains some confusion as to the cause being cycling or picking up too much during a recent move.