As with many people that look into upgrading to a 12 speed drivetrain, this customer was looking to gain an easier climbing gear without having to give up his high end gear, and that really is the beauty of these modern 500% range cassettes. This customer actually gained a lower climbing gear and a higher top end gear, and got to keep his beloved gripshifter! With the full XO1 kit there isn’t much left to be desired. Enjoy your new drivetrain John!