Lol, it's not that hard really once you get a rhythm going. I jacked out of that run as I got bored.

I was thinking of doing some kind of endurance survival run just to basically take the piss. Something akin to the endurance events al la gran turismo. Mabye go for about 5-6 hours and see how far I get We'll see if I get that bored this weekend.

I tend to get bored when I hit about 200 kills.
I applaud your patience.

Very nice. I've never finished a survival mode though, I usually get to 300 or so and just get really bored.