Pain in the Tailshaft!

I don't have the D200 anymore that I talked about above, but after watching your video I went over to my neighbor's house, who has a similar one, and took a look at his. There is a "lip" on the crossmember on one side, and not on the other. On his, the lip is to the rear- your vid shows yours to the front. Flipping it might be enough to make up the difference. As said above, make sure any slots or play in the mounting holes are biased towards the front- if it's only a half inch off it doesn't take a lot of play to get it moved around.