I sure had a hard time convincing you!What's unique and hard about the BK is that you need to remove the black stove pipe to vacuum out the cat chamber and the back of the cat after sweeping. Much harder than my non-cats where I could drop out the baffle, and reach everything from below.
I was not a believer in removing the flue from my BK since this PITA seems unnecessary but it's not too bad of a job. I now sweep and then follow with the flue removal and vacuum.
I wouldn't want somebody carelessly retightening the small sheet metal screws into the black pipe since they can easily strip.