This what i can tell you so far
Inside theirs a chip piggy backed on top of another chip the wires look loose to me
1st position 64XL with blue ready screen which pass all the tests for ram/sound/keyboard all okay Sio2SD loads and works fine
2nd position i get ether a red or yellow blank screen or sometimes i get blue ready screen with a horizontal lighter blue stripe that moves
3rd position i get black screen or sometimes i get a normal blue ready screen. I noticed in this position Sio2SD loads on screen fine but refuses to do anything else even when pushing option for disabling basic