Fasten the Forstner bit in the chuck appropriately. Drill pilot holes significantly smaller in diameter from the top sheet. Then turn the board over and countersink the base with the Forstner bit. Flip the board back over again to its original position. Now use the 19/64s bit or whatever size of the Forstner bit you are using. Drill the hole as needed without disrupting the rest of the arrangement. As a result, the workpiece will be cut cleanly and straight with minimal chipping and flaking.