Anyone Modify RS6 Stock Exhaust?

[GmbH1]

I'm thinking about modifying my stock exhaust instead of doing a full non resonated system from Milltek and wondering if any of you have done this? I brought my car into a local custom exhaust shop and told me I could just leave the back section as the stock one appears to be free flowing and just delete secondary cat and mid resonator so straight pipe from the downpipe all the way to the back section. I just want it to breath a little better and hope to get the deep sound that I had on my last non res Milltek. Any thoughts or other ideas would be greatly appreciated. Thanks