Frantisek, I have a F-803, and it is by far my favorite bag. I have replaced the insert, now it has 3 padded compartments, and I usually pack there an LX, 2-3 extra lenses, meter and a Bogen table top tripod. The middle compartment is large enough to fit vertically LX with 50mm mounted or a rolleicord. If I have too much stuff, then the camera goes on top, lens down, resting on the padded dividers.
check out http://w1.320.telia.com/~u32008343/domke.htm for some nice pics. Best, Mishka