Hi again

A million questions, I am an apprentice rather than a book-learner, but without a tutor...

I have been sitting here with my cantle and am at a loss re what to do with the very long posts - they are longer than the edge of the cantle, so will poke into the pouch and will inevitably scratch. Do I just hacksaw off the ends? I have tried to add a photo, not sure if i'm doing it right...