Done it myself, and on several bikes over the years.
No one works on my bikes but me. My Dad starting teaching me to work on them when he taught me how to ride(24 yrs ago). He's an engineer, so not to say that I'm good, but rather that I had good instruction, and I also went to school for auto mechanics for 2 years(all I'm trying to say is that I'm competent, not some
hack with a screwdriver and pair of vice grips). I'm glad too, as idiot motorcycle mechanics are as big an epidemic as idiots in general.
Anyway, it's easily done.
I like to shorten them too. Drill rivots, disassemble, bandsaw a few inches off. Put back together, re-rivot, done.
Did these gen1 2bros bolt-ons for my gen2 before I bought a full exhaust(these are only ones I have pics of).
I left the packing in though, as I personally think it's too loud without it...at least now. I like quiet exhausts anymore, as I don't want people to hear which way I went