I have noticed on a few different sites that a number of people have discussed whether or not the jagged edge can be made straight. I thought about this problem a number of years ago but being busy with other things I didn't get around to finding a solution until recently. Well I can assure you that it can be done. Just to prove it, I have included pictures of a sample piece I made below.
As a bit of fun, I have included the following picture to see if you can quess what it is. I can't give you any clues as it would be too easy to guess what it is. Sorry!