Obviously what works for some does not for others....I guess that is why the good Lord made us all different sizes and shapes...I have had 3 different types/sets of rider pegs on my last 3 bikes...I have never been able to ride using them for very long no matter how I adjusted them..The two bikes I had with floorboards worked the best on longer rides, but now as I get older, and my knees get a little tired, I just hang my legs down from the seat for a few minutes and then go back to the stock pegs on the F6B..Good luck and I hope you find a solution.....Back issues "suck", I speak from experience....Ride safe