Holy shit you’re not even joking.
Yeah this was dumb as hell. You could’ve diy’d this for half the cost. A cleanish higher end T420 plus that panel and the edp adapter…
This is the kind of mod you do when you’re just trying to fuck around, do it because you can. Not because it’s worth doing, a 14” 1440p panel is questionably usable? Nothing this machine is capable of will do well in 1440p. I guess it’ll look good for 1440p video playback but then it’s a 14” display, it won’t really be that noticeable over 1080p.
And they did nothing else to it mod wise to really make it worth that kind of money. A $400+ T420 in my eyes needs to have all the off the shelf basic mods done do it, usb type c power is a $20 mod, a processor with hd4000 is kind of just expected at this price, not something you should add yourself.

If this is disposable money for you, sure. But you could’ve gotten a more fleshed out modded T420 for less money. This is basically just overpaying for a situationally useful 1440p display.
This tanks your battery life too.