@axur-delmeria: Indeed, the X220 came with this aluminum piece heatsink and the X230 used copper.

I'm not sure that's enough to make a significant temperature difference, I'd attribute Ivy Bridge just running cooler to that. In my stress test the CPU did downclock to 2.6 ghz while the graphics ran at max alongside it to maintain a max temp of 95C, HWMonitor claiming 41W usage on the package.
The X220's lid, keyboard bezel, keyboard with taped pins, palmrest, drive cover, and ram cover are now installed on the X230 motherboard in X230 bottom case. The X220's keyboard bezel doesn't fit exactly on the left hand side but I'm ignoring it.
The Bluetooth LED doesn't light up.
I'm in need of an EC firmware flash for the classic keyboard and battery whitelist removal. I also need a battery, the one that came with the X220 is in fact a 44+ LGC X230 battery, but it's very dead.
An otherwise complete Frankenpad. The poor condition of the palmrest and touchpad and some minor defects in the IPS panel make me apprehensive to sell the machine, so I guess I'm stuck with it.
Lastly the clickpad is * jumpy cursor and no buttons bull * this is my first Thinkpad where I'm disabling the touchpad. edit: Re-enabled because I reflexively reach for two-finger scrolling.
