You have now installed the GRS stock! Now go to the range, re zero your rifle, the point of impact will shift because of the different recoil absorbtion.
The top three inlets are made to fit the original pillar bedding blocks. These are not provided by GRS, so you need to get a new pair from your local distributor, or use the ones that is in the original stock. The Blaser R8 and R93 stocks are made for the "professional" inlets (not the two piece). These need to be glass bedded in the rear of the action where recoil is absorbed.
IMPORTANT: If the above mentioned stocks are not glass bedded warranty is not valid.
Any question, please ask your local GRS dealer.