The ContourHD (and the new GPS version) is probably one of the best all around helmet cameras available. It is low profile, lightweight, simple to use and it has great image quality.
The Vforce Grill is a lightweight, super comfortable paintball mask with a quick change lens system that makes swapping lenses a simple procedure.
The problem is that the ContourHD does not have mounts that will work with goggles that do not have straps the full length of the side of a mask. This makes mounting the camera problematic on goggles such as the Vforce Grill. Until now.
Old Bicycle inner tube
Vforce Grill Mask
Contour Goggle Strap Mount
Step 1: Goggles and mounts
The second picture shows the Vforce Grill. You can see that the strap actually connects into the back of the lens clip. While this makes the lens very secure and easy to change it means that the normal horizontal mount will not work.
In order to mount the camera to the side of the goggles you will first need to remove the lens retainer clip. The third picture shows just the retainer clip off from the mask. There are very good instructions on how to remove this piece in this Instructable here .