140 miles was uncomfortable for you?? Wow, I had a sport touring back back in the day that was extremely comfortable, but I don't find the RR to be uncomfortable at all.
I went on that SOCAL canyon run last Sat. It was 140+ miles for me from Borrego to home. Not sure of the total miles from home to borrega (different route), but has to be close to the same. The only thing that bothered me when I got home was my legs being tired.