[hirofkd]

1) Like Amazon said, the styrene glue holds better than super glue. Super glue is effective against pulling force, but not against the bending one. What you need is a "good" styrene glue with an applicator brush (like Tamiya's orange-labeled bottled glue) or a needle (Testor's). Use a brush and gently rub the glue on both contact surfaces, and bond them together and wait for an hour or two. That will hold parts well.

There's non-fogging superglue from Rocktite, but it's not readily available, and I don't think a different kind of superglue will solve your problem.

2) Test-fitting is a common procedure in model making. It's definitely the manufacturer's fault, but only builders can correct it. Just use a file and sand paper, and test-fit until the parts align well.

3) This can also be solved by styrene glue, because it won't bond metal and plastic together.

If your local hobby store carries Tamiya, I recommend that you get the orange labeled glue. Hobby Lobby and Micheals should be carrying one of those thing called Plastic Welder, and this works well, too. Testor's glue with an applicator needle isn't too bad, but you need a precise control of the needle, so I still recommend the ones that come with a brush.