I want to use a ps4 controller on my ps3... In addition, I'm wondering of the “ps4 back button attachment”, where you can basically reroute buttons with a controller accessory would work.
How to Connect a PS3 Controller to a PS4
Here's How to Use PS4 Controller on PS3
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TUTORIAL-How to connect your PS4 Controller to Your PS3 Wirelessly Without a USB Cable - YouTube
Your DS3 And DS4 Can Be Used To Control Your PS2 - Wololo.net