I would like to purchase a jig to make dovetails. I know that they can be done by hand, but I think a jig would probably be better for me. Probably would start with through dovetails, but a versatile jig would be nice. The two I have seen that would seem to be in my price range would be the Porter Cable and the Rockler. What can you tell me about these two such as ease of use, etc.? if there are others in that general price range that would I should look at also, please tell me about them.