my cpu is now running at a lot cooler temperature

Works like a charm, my temperatures are good now!

With the MX-4 it seems like average temperatures have dropped 3-5C, and under high load comparatively around 10C. Getting the new paste on is fairly straightforward, and having no cure time means you don't have to wonder if you got it right the first time

all cores with 1.35v temperature very stable at 34 degree idle and 73 -79 full load

Laptop still runs a little hot (old fan isn't moving air as well as it should, I suspect), but it's now able to run at more than 24% CPU load without crashing, and I haven't had a heat-related system crash in the two weeks since