[JasonZ-YA]

Here is the camera mounted on the beam using the shims.

LOCATING SHIMS:
If anyone wants some shims let me know, or you can easily make some out of wood or by grinding down some sheet aluminum.

Ive even seen wedge plastic scrappers that can be cut and drilled to make a tapered shim.
I have also seen door stoppers, etc. - check the door hardware, misc section of any local hardware store.
also check google "wedge shims, etc"

-j