In this step, cut and paste the bread to fit the knife bottom
step 3 of 4
In the step,
you can either- erase the bread to fit the knife, or ctrl -click and invert then delete the selection. you should have the outline of the knife
step 4 of 4
In this step you can add the screws to the knife.
http://www.pxleyes.com/
find one of the seeds that looks like a nail or a screw