I also add a heating pad behind the socket, whether I do LN2 or phase. Think it helps with 24/7 also. I would never touch dielectric grease again. That stuff is soooooooooo horrible. Get's everywhere and on everything. Really nice writeup. Great job on it! Also I know a lot of people fill the first memory slot with eraser also. With LN2 that is necessary as it gets frosted up pretty but, single stages will be fine I guess but with a powerful cascade it may frost it. Can anyone confirm?