Cutting a normal disk cover to make it PT compatible

I have rear wheel cover that i’ve been using for a few seasons. When i first got it, I had to trim it a little to make it fit properly.

Is there any reason why i can’t just trim the center holes to accommodate a PT wheel? Has anyone done this with good results and if so any tips?

My wife and I have wheelcovers that were cut to fit by Rich at Wheelbuilder.com

He cut the outside to fit the rim and the centerhole to fit our Powertap hubs. So it can be done.