The only other piece of information that I can offer is to be sure that you can easily see where you are routing. Just because it "feels" like it is in the correct position, it might not be.
I didn't feel like leaning over my cabinet when I routed a couple places where I had to cover up the previous routing track with bondo. At first I had the router bit up to where I couldn't see it, but it felt securely in the previous routing track. It felt like I was cutting fine for a inch or 2, until I found out I had ran out of the groove and put a huge gash in it... good thing it was on the top, the t-molding covers it right up, but it could've been disastrous.
One more piece of advice, do routing before painting; I scratched up my paint job when I had to do some post-painting routing.