Ah fair enough, and that's pretty cool. I'm not objecting to Tune Bot. I've got an Evans Torque key which I use now and then, but I wouldn't mind owning a Tune Bot just to see what it's like, plus I should think it's fun to play around with.
But here's another point, and I'm probably talking out of my butt but just trying to educate myself here. Every shell has it's optimum resonance. Like when you tap it without any heads on, such as DW do where they mark a shell with a particular note.
So even though with Tune Bot you arrive at the same note, on a same sized tom as your friend's kit, that doesn't take into account if that note is going to sound as good if your shell thickness/bearing edges/wood type is different. I mean, it might sound choked, or not pitched high enough, no? Perhaps a lower or higher note would sound better/more resonant given your own shell's makeup?