I did exactly the same as Pablo on my scratch build yesterday, I only have a cheap router bit set that you could buy just about anywhere. Some bits have a larger bearing foor instance the 12mm flush trim bit, while others such as the small round over bit will have a small bearing. All I did was swap them over until I got the right sort of clearance and Bobs your Mums brother.Click image for larger version. 

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ID:	19099 I am fairly sure Pablos was the same sort of setup.