Damn good math in this post. And it's correct. Now, for giggles, move either the intake or exhaust CL and see what it does. So start the intake sooner (wider LSA) or open the exhaust later (wider LSA) even though the duration stays the same.
You can play with that for a while and you can learn a lot. Every move changes the overlap triangle and that's what you want to watch when it comes to LSA, while considering low lift port flow characteristics.