You might be right about the shield being a possible problem. You can see without the gunpod that the pegs on the arms do no line up, thus making the gunpod crooked when it's finally mounted. I'm not sure how adding width to the handle, like previous members have done, will fix the problem, but I'll give it a try until you or someone else figures out that clean fix.
Oh, and I guess I'm the only one that's bothered by the gunpod more than anything else, including the landing gear-lol...