Hi, you don't have to trim any off the tops, just line them something like this. The finishing strip ends at the top of the bottom detail on the bottom of the thighs.The right thigh has quite a bit of extra material on the bottom, as you can see in the photo this will be hidden by the knee ammo pack. Notice the detail on the bottom lines up where you have the red arrows, just line those pieces up. The bottom of the left thigh may not line up perfectly. Let me know if this helps.
Nick