adding fin box vs glassing fin

[turtlebo]

I just recieved instructions for the 9'2" performance longboard. My question is when I add a fin, if I use a fin box should I finish the skin and then router a groove for the fin box to fit into or should I prepare for it beforhand? Or, How do I go about glassing on a fin?

[turtlebo]

never mind. I didn't see the post by Wyatt under construction before I posted this. That thread makes pretty good sense. I will revisit it when I get closer to that point.