I had the Monotubes installed and loved the effect. No more bone jaring hits, the bike smoothed out and tracked much better. I have my GL in the shop as I type. springs will be installed by Thursday morning. I have measured the height of the front end to see if the bike raises as I was told? I will post when I get a chance to ride it and test it. IMHO the rear shock is not worth the money to change, I never had a issue with the back.