Mine finally arrived today!
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I'm still at work right now, so I haven't had time to sit down properly with the instruction manual, but I will say that your tight cylinder issue is actually mentioned in the manual, Ruprekt. (I have the same issue too). It says that the cylinder fit had to be made tight in order for the cylinder to revolve properly for firing, and if it is really stuck, it helps to flip up the bolt handle and spin the cylinder counter-clockwise as you push it out, or also counter-clockwise as you push it in.
It also says that the cylinder shaft screw getting loose can cause the cylinder to stop coming out altogether, so be sure to check that the cylinder shaft screw isn't loose. Only problem is, I can't tell which is the cylinder shaft screw...