While that is generally pretty good advice, it is dependent on how much down travel you have. I just found out the hard way that 10* above is not enough on my rig.
Thanks man, I've always liked the MCE flares but she's been unconvinced on going with flat fenders. I was going to just cut the stock ones but she wasn't having a bar of it! Now she can see what it looks like I'm golden!
Here's mine