Yves, the least expensive option for mounting your router is to directly bolt it to your table. A much better option is to buy the Grizzly #PT10432047 "Insert with pin" for $13. I suggest you buy two of these plates because you will end up with another router eventually and will have the new plate on hand to use it in the same table opening. Read the Sticky threads at the top of this section for information on how to install it.