Shane makes a good point, and that is that there are more than one way to do a lot of the topology. There are lots of free resources out there that will show you different ways of doing it. And it would be best to look at as many different ways as you can, so you understand why they were done differently. Once you understand why, you will know what to do for varying situations. Don't be afraid to think outside the box either. If it works it can't technically be wrong, but may be different.

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