@jcboy,
Whenever you're cooking with flour, it's an estimate due to the humidity, etc. Basically it's flour and eggs - you salt the water not the pasta. 3 cups flour, 4 large eggs (or 4 c flour, 5 eggs - depends on how much you want to make).
You won't wear your arm out with your Kitchen Aid attachment
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Most chefs recommend rolling it through the largest opening (0 or 1) 4 or 5 times, folding it between rolls, then doing 1 or 2 passes through the others down to the lowest number, making sure you lightly flour the pasta between rolls - you don't want it sticking! And don't wash the pasta maker - just brush the flour off. And using bread or pasta flour is preferable to AP or semolina flour - more pliable and gets thinner. Do you have somewhere to hang your pasta? Better figure that out first. Sometimes I use the racks in the oven to hang it on.
Good luck!