Thanks mate, I took a look inside of them last night, but couldn't decide wich screw you ment, and didn't think of taking a photo until I had them closed again :-) I did find a short term fix though.
It seems that the one (IWC Spitfire) has a bend pusher arm (?), the little stick indside, that press at the movement when I push the button. When I then turn the button a quarter of a turn(it's round so it can be turned in the socket), it gets in a position where it get stuck in the "in" position! I tryed to straighten it out, but didn't make it better. Well, the short term fix is, don't turn the button But I'll try to contact the seller, and ask if he can get me a new button/pusher.I know it's a long shot, but why not.
The other one (PAM 196) looks perfectly fine, but I think it was the button that was stuck here too. When I took it apart, all worked fine individualy, movement and button/pusher, and when I put it back together, it was as good as new? But I know that it'll happen again, so I'm none the wiser???
Well, they both looks perfect again, I'll just be a little conservative in my chrono use
Cheers