Hi,
Here is how I did it in a very simple way.
You put the coin door in front with the front of the wood plate.
Then you mark it all around with a pencil.
Finaly you measure (on all four sides) the distance between the borders and the hinge of the coin door.
You remove 1 mm and draw it on the wood.
You cut.
Then its just to make a little sanding so it fits perfectly with "almost" no need for screws ...


