Just an alternative suggestion would be to perhaps try a Grip Force Adapter on your Glock. It won't remove the hump obviously but the adapter fills the grip at the top to make the gun point more naturally. They're cheap to try and you won't butcher the gun so it'll be easier to resell if you do decide move to another gun platform later on.
http://gripforceproducts.com/Home_HSQ6.php
I had never liked Glocks but after using these adapters I can now live with Glocks well enough to own and shoot them. With the adapters you'll still have a bulky grip but the gun points so much better. At least it works well for me.