I’ll hijack this thread to thank @gadgetoid again for all the hard work. I don’t know about fitting a PS3 in the Picade, but the PS TV is perfect for these machines. And as for the mapping of the buttons on the Kickstarter edition, they’re slightly, slightly off, but completely playable. Available in this thread: Trying to get Picade to work with a PS TV
Still completely chuffed with how it turned out for my Picade: