Next you will need to make the hole for your basin in the top piece. Measure your basin (we found an old sink that used to be in an RV at a yard sale for $2). You can find these at a store too but we waited to find something that we liked and didn't have to pay a whole lot for.

Turn your sink or basin upside down on the top to draw your outline and drill holes in each of the corners for your sink. If you are using a circular basin then you may need to make several holes for your outline.

(You may want to add extra screws along the edge of where you will be cutting so that your wood will stay in place and already be fastened down after your cut)