Most EC players have more sense than to swap notes around but for a while it turned into almost a hobby for me! I seemed to develop a knack for snapping levers rather than springs - usually at the most inopportune moment.
The quick fix was to whip the end off, swap the two pairs of reeds and put some pvc tape over the broken pad.
THe hardest part I found was swapping back to where the notes should be!
Mi-ul