OP here. Delidding was super easy. Not sure what the big deal is, unless it's a static discharge worry or something like what happened to IDontCare.
Just take your time, don't force anything, and you should be fine. I don't see how it's something that needs practice so long as you are careful and do some research (where the transistors are under the IHS, etc).
I lapped it too for kicks. Like most IHSes it was high on the outside and lower in the middle. I started with 800 and got it down to 2000 grit (which frankly still seemed pretty rough, and I would have done 5000 if I had it on hand with me). Lapping didn't really seem worth it, but since I changed so much going from stock everything to my final setup with a 240mm rad, it's hard to say how much it contributed.
So, right now, it's at stock speeds, in an Ncase M1 with a small res, Apogee Drive II and an alphacool ST30. The reason I want cool is mostly for quiet. The cooler it's running, the less the fans and pump need to work, not to get the most out of an OC.
In the future, after the new AMD cards come out, I'm going to decide on a GPU, add it into the mix along with 2 more fans and another rad, possibly a modded ST30 or a Black Ice Pro II.
I am going to start playing with OC settings though, just cause.
Now, running Aida 64 with the turbo on the CPU at like 4.4GHz, the cores hover in the low 60s with the occasional spike. I was hoping for better, but that's an ok temp.
As far as reattaching the IHS, I clamped it down in the mount, and then applied a dab of silicon in the corners to hold it in place. Doesn't really do the job, so I may put some more on there. I don't want it between the IHS and the PCB. Any suggestions?