I'm still undecided to be honest, I've purchased some new HSS bits and the step bit to drill out the baffle as it's definitely not loud enough. Now thinking maybe should just sell the Akra as is and buy something already baffle free. It's also quite large, and I do really like the look of the AR end pipe. I guess it depends if I can find a buyer, may end up just keeping it for the moment.
You posted above, audio file before and after but there is no file or link? Do you still have the audio?
Observation is the greatest source of wisdom.