Hi,
I have the same problem with sinking nose wheel of the SMS 747. It is too bad, SMS Overland is a "light weight" plane, looking really great in FSX and.... I had it working once before. Now after reinstalling, nose wheel dips down again and I can't remember what I did before to fix it. Changing contact point number makes it even worse. Enjoying Posky's 747 until I find some way to fix the SMS747.
Have a great weekend