I also did this conversion. It's a cheap and effective mod. It doesn't give you the output of HID's, but it's cheaper and more reliable. Not to mention it's super easy to do and is a great improvement over the H11's.
the 2100 lumen of the H9 do make a difference, this is a very worth while mod for those not wanting HIDs, heres a little different diagram of what needs to be cut. H9