Yes, the gun ports do fall on some of the frames, but at this stage when the first planking is done, the frames are not really required for support. It is frustrating, but that is Mantua for you. There are other problems like the one you just mention, but the key is to check the instructions, the plans, and try to figure out what is supposed to be accomplished before committing. Dry fitting sometimes helps resolve the issue and is really necessary when attaching fittings . What I see is that they did not rebuild the model after redesigning the kit and updating the plans, so there are some alignment issues. However, the did solved some of the other things that were even worse in the original design.