Okay, let's just address a couple points here:
-A properly-adjusted triple does not shift any worse than a double. This is an awfully persistent myth. You won't get better shifting, especially not if you keep the same front derailer.
-If you don't use the 30, just don't use it. If you want to deny yourself even the temptation, adjust the limit screws on the derailer to make it impossible to shift to it.
-For the second time, a well-adjusted triple will shift just as well as a double, you're chasing a myth here.
I like to tinker myself, but this isn't worth tinkering with.