A word of warning when upgrade the RAM on a new Aluminium iMac

I was pleasantly surprised to find the new iMac's in the Trafford Centre Apple Store in Manchester, UK yesterday - only 24 hours after the announcement by Steve Jobs.
My credit card got the better of me and I bought a 24" 2.4Ghz model and took it home to set up. It comes with a single 1GB SO-DIMM, so I swapped another 1GB stick from my previous white model (ordered a 2GB stick online too).
The design of the RAM cover is of course different and now relies on a single central screw to hold it in place. Removing it to fit the DIMM was straightforward, but in replacing it, I managed to jam the screw and at the same time damage the head.
I'm VERY careful doing this sort of job and have done it many times before, but the screw damaged easily and it took a long time and a lot of effort to get it out - in the end we had the drill the head off. Fortunately managed only a couple of small scratches on the soft aluminium case, but need to find a new screw and it was rather stressful!
The purpose of this post is really just to warn people to be very careful if you are opening or closing the RAM cover - it was far too easy to damage it.
On the plus side the new machine is fantastic - very quick, looks gorgeous and I'm getting used to the new keyboard and starting to like it!
Hope this helps.

I heard you mentioned that you ordered a 2GB stick. I was just wondering if you could mix and match RAM sizes. I knew that this used to be an issue on motherboards, trying to mix and match 1GB with 512MB or something.
So just to clarify, you now have 3GB of RAM, right? And it works like that, or does it think you have 4, or 2?
I would like to know, because I'm on the verge of buying one of the new iMacs out there.

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