I could look at 9020 (others have asked me to do the same also). But the problem is I am ending up with many computers laying around! I just the same mod on HP Elite 8300. If I can find a 9020 for little money I will buy one and update the post (again).
One think I have noted from the post that
@trs96 wrote is that my guide depends on using the Windows tools. When I originally wrote the guide it used a DOS based boot disk to do the modification. I changed the post to use the Windows tools as I thought that would be easier for people to follow. But now I understand that there is a group of people that would have an easier experience with the USB Boot/Dos method. So perhaps I will go back and write it all over again