One piece or cloned pieces

I’m making my way through this tutorial … iIvtD9hjHv

which has been slow but illuminating.

I’m making a Province module from scans of my punchboard for my personal use (mostly to learn how)

anyway I’m wondering while i’m here I need to make three identical pieces. Would it be best to create them in an “At Startup Stack” or should I create the single piece and clone it three times somehow?

Just curious if there’s a common way to do this. Thanks for the time.