Porter Cable with Z5 + question
 

I'm debating on getting a porter cable with some sonus pads. I only use Zaino on my car. I have seen the PC used with different swirl removers such as Swirl Remover 2.0 and Sonus' Swirl Remover. I haven't seen anyone use it with Z5. My question is how much better is the PC with Z5 than doing it by hand. Exactlly how effective is it and it is recommended to always use the PC when detailing the car? Sorry guys I'm trying to justify the $200 for it.

I haven't used Z5 before, but I tried Z2+ZFX with the Porter Cable and it didn't seem to work too well. Zaino products look like they work better by hand, from what I've seen.