Yeah, but I think I have it licked now. I was getting some mid/lower back pain on long rides.
I had Spencer's new "LD" seat mod done (better gel/different foam than he normally uses). It's only $25 extra I think, so you may want to get that done too.
I also pulled off the
MCL riser plate (putting that up for sale soon) to put me back into a more forward lean position. I think the too-upright position was too much for me.
I also picked up one of these to use for those REALLY long days:
Back-A-Line: Real Solutions For Back Pain