I wish I hadn't sold off the 1400XL motherboard, it was in a modified 1200XL case and yep it worked, had a pbi bus too, someone has it, it has a rough cut hole in the back where the pbi is, as I didn't have the proper tools to get the job done right and of course it had no shielding, once the hole in the back was cut out the 1400XL slid into the case with no other mods, the place I bought the motherboard from(Best Electronics) doesn't have anymore, though they do have it in their catalog... I'd sold it to some collector up around Wisconsin years ago, who I found through Curt Vendel, I didn't use a stock 1200XL psu of course, but one of the better ones that are/were sold by Best Electronics, along with a stock 1200XL case and keyboard. All I have now is a disassembled 1200XL, oh sure I have some other parts, an Indus GT, a Wico joystick, an Atari type s-video monitor cable, and an ICD P:R Interface, plus a few carts and a disk. The 1200XL needs a few mods, like to the SIO port for the ICD P:R Interface and the mod for the s-video monitor port, I'd been meaning to get this done and have the 1200 working off the 57" TV, but things just kept getting in the way, so far it looks like the mods might be something I'll get a friend to do in 2016, He's an electronics tech in His spare time.