If it took you so long to get a PSOne screen, I have a suggestion. It's something I've considered doing. Either keep the case of the screen on it, or make a new one for it (which is what I'd do, as the normal case is bulky). Then, make a connector to it that is glued on which would contain all your video/audio and power connections. You would then design your portables with the idea of a detachable screen in mind, incorporating the other side of the connector into their case. That way you could build multiple portables and just switch out the screen when you want to use one. This is all assuming you're building them for keeping and not for selling.