ported my eaton.did similar as steig does and filled the silencer holes.
this was a messy job.lots of aluminum shavings .good thing i did it at work.all in all it was worth doing it myself.took me around four hours.im happy with results.
looks pretty good. Just check with the rotors in the case to check that you didn't gut the outlet a little too far on that outer hole you added, looks a little on the wide side, and you don't want the opening past the compression outlet of the rotors or boosted air is going to be pushed back up into the rotors on the outer edges.