I see your concern now that I look at my heatsink. Both the raised sections around the copper slug have the original thermal pads on them on my heatsink, therefore preventing a short on the metal. See photo.That's odd....See pic. Ram chips are clashing with the elevated section on the left. Also a tiny bit with the elevated section at the top..... So guess I need to use a shim on the chip so it is level. What do yours look like? Thanks
K1100M is installed and flashed, so I can again confirm that with the thermal pads present there is no short on the heatsink. I suspect they are needed to avoid direct contact on the VRAM and the one coil in the top left.