Thanks all, you are great!
Righty, it went well. They were impressed about how well I managed to stay tight and in focus on all the breaks. The cab there was a 1960 Marshall so I was lucky, it sounded smashing. They play very well and their compositions are quite demanding. I even had the shivers sometimes because it was such a fat sound.
So, final decision is not officially taken as they have to discuss etc, but the other guitarist already said how impressed they are, that it was like I would have played with them since a long time and I should be prepared to do more songs for next week and they have 3 smaller/medium festivals booked this summer so I better get to work :O)
Here is their MySpace site, they also have some vids:
http://www.myspace.com/freelaunchbandOne can argue about if it's real to the bone brootalz etc, but I really enjoyed playing with them. Their drummer slays and they play together so well and tight, the sound in the room was PHAT and it was so much fun to be part of it!
So let's see when I get final confirmation, but I'd say I have the job 90%