Video`s J-105 EADHG

How do I fill the tacker with staples? And how does the safety lock release work?

How do I change the front plate if I want to use fine wire staples instead of flat wire staples?

Why aren't any staples coming out of the tacker? How does the trigger guard work?

What happens if wood is too hard and the staple won't go in all the way? How do I set impact power?

What's the distance holder for and how do I use it?