Hi!!!
So, the job isn't that bad.
I once installed them on my new [device/item], without using the included accessories.
to dismantle it. And in the process, I even had to re-tap a thread

.
But whatever...
Exhaust system removed. Screws loosened. I hope this helps you.
It's just a little bit involved. And the rest, you probably already know.
Definitely replace the studs and copper nuts.
Gut.. Stehbolzen muss du schauen, wie die aussehn. I'm currently building something.
Always use copper grease with those things to prevent them from seizing up.
It works perfectly for me.
Regards, Acid.