Hi rprice
I have many Porter Cable routers and I don't use the speed control numbers ,that's to say I always start with the number 1 and move up to what the router and the bit tells me what it wants to have,, they all have a voice and will tell you what they want or need ...

one number for Oak,Cherry will not be the same for pine or the size of the bit you are using... speed feed comes in to play all the time and the router will tell you I'm going to burn/chip out your wood if you don't slow me down or turn me a bit faster ..

always make a test pass b/4 you run the job...
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