That's all hardware though. You can get stronger stuff, or weld. Plus, powershifting is really not ever necessary on the street. If you are racing, you can shift fast but not hard too. I know a bunch of DSM guys who would break there adapters while what i said above (rewelding) works great. But the dudes who broke there adapters compared to the others that didn't weren't running faster. You don't have to slam gears and with an accord tranny, it's not like we have rough sycros and have to "man handle" it.
Sorry for the rant, i just never understood slamming gears except in cars that are hard to shift (old 4 speeds).