golf

I recently installed an Invidia Gemini cat back to help with the "beautiful" sound Berk TPs make, and it turned out great, completely got rid of the rasp. The only issue is the typical hissing/rushing of air sound that test pipes like to produce.

Pretty much right now I am trying to look at all my options (HFCs, ART pipes, don't have stock cats anymore ) and I am really interested in your opinions of a custom resonator from a trusted muffler shop to try and remedy the hissing.

Has anyone done this?
Is it even feasible considering TP positioning/shape?
Am I a fool for even considering this?

Again I'm just searching for options and this would be a $200 job compared to $500 Berk HFCs. I'd love to hear your opinions.