Cool.

Thanks Daren! I appreciate the info.

As for going beyond 18psi......

I have thought about upgrading the injectors and getting a S-AFC so go with it, (or the equivalent) but that's getting into territory I had never planned to get in to. (my planned path was to simply make use of what came with the car in stock form)
Realistically, I don't even use all the power I have now (damn traffic)
Consequently, now that I finally have the Evo IX Recaros in my car and everything from belts to brakes have been freshened up, I am finally content with this car.