I'll rob YOUR hood

Ta da:

Flute 13
Clarinet 12
Saxophone 12
Trumpet 24
Trombone 13
Tuba 13
Harp 13

Just to clarify, did we ever decide if it was kosher to do the above move? John took from trumpets and gave to saxophones, I in turn, took from tubas and gave to trumpets. Thus, it is not undoing the previous move. Can I get an official ruling?