I'm generally very pleased with the ergonomics of my R1150R, but since I switched to the slightly higher Sargent saddle, I find that I'd like to lean back and up a little more. Bar backs seem to be the logical solution, so I'd appreciate any feedback you might have on the virtues/drawbacks of any risers you have experience with. Also, have you experienced any effects on handling, buffeting etc. with the risers. I'm using the BMW Touring Windshield.