One more thought; have you tried heat on your hamstrings? I find it very helpful, much more so than ice. The IT Band problems are tough; been there. In my case, I had to basically be a couch potato who only did two specific stretches for IT Band problems. No walking, cycling or anything else. That said, mine was severe, and was making me limp and yours may not be that bad. If I recall correctly, the bike can really aggravate the IT Band, but perhaps you can double check that with your OS. This is such a zig-zag recovery; aarrgghh!