Wow! Thanks for all the information everyone. There appears to be a lot of info out there; more than I thought there was. I don' t think my "fit" is way off, but since I have never been fitted by someone who knows what they're doing, there is probably a lot of room for improvement. I just turned sixty and, as a birthday present for myself, signed up to do the Markleeville "Death Ride." So any small tweaks I can do to make myself more efficient and/or more comfortable will be helpful! These suggestions and links are very much appreciated. Thanks, again.