If the fastlane post is bent forward, could work well, when I made a taller post for my M7......... then it was up high and yes nice and clean looking, but too far back for good cornering and steep hill climbs, so on my M8 a higher two swivel riser and f7 bars allows up and forward, and bars rotated for proper wrist angle which is hard to get with stock M series rubber bars just going up higher. other issue was.......when I made higher stem, had to make several with much heavier wall chrome moly to get flex out and while it looked good, it was as heavy as stock with aluminum swivel riser, and the swivel riser was way more adjustable.
