I had to just a bit. I took the thighs down from the top so it didn't take away from the exposed knee ridge. I had to do the same with my shins and took off from the bottom where it meets the boot, again to keep the ridge at the knee. I would advise taking off less than you need and doing a refit so as not to take off too much. You can always trim more, but putting it back is not so easy. Good luck!