First of all, I reported the length of the camera on the wood, I measured the distance between the hole where the tripod screw attaches and the edge of the camera. I reported it on the wood and I drilled. Since I haven't the right drill bit size, after drilling I used the dremel to enlarge the hole to the right size of the tripod screw head... Then I placed the wood on the tripod head where I had previously installed a longer screw than the original and marked the point where to drill the hole. This hole will be used to attach the plate to the tripod. Finally, I made the last hole (again after marking the point) and the plate is done!
To make it look better I used sandpaper and I gave it two coats of extra virgin olive oil ;)
I got the idea to make this project an Instructables when I was finishing it, so in some photos you can also see the next steps. Sorry ;)