I installed the kit with my 1.3 matte screen...
Oh my the screen is a massive upgrade in picture. I put it up beside my T61 and it really shows the colour difference between IPS and TN screens.
The install was pretty simple, but a few notes of wisdom...
DON'T do the install with any power connected. Disconnect the power block and pull the batteries. You will blow fuses.
Be careful with the display surround plastic, I snapped some, tried to glue the broken bits back on, now I have to order a new surround... lol
Careful with cable routing, there are some nasty pinch points that will cut into the cable on the T420s at least.
at the quality of picture after.
T61 14.1 WXGA+ 220nit, T9300, Owl blade fan cooler, 8GB PC2-6400, 2010 revised NVS140M, Samsung 840Pro 240GB, AR9390 N, BT4.1, NMB keyboard, T400 palm-rest, 33++ battery.
T420s 14.0 HD+, i7-2460M, 16GB PC3L-12800, NVS4200M, Samsung 850Pro 512GB, Intel 7260AC, BT4.1, Chicony KB, 81+ battery