You can define any standard Mitchell on the Event-Define Movement screen. When you enter this screen the default movement is Mitchell as shown on top of the screen. You need to enter
Number of Tables, in your case =9
Number of Rounds, in your case =8 as you don't want to play the last round
Boards per round = 3
Select Winners as One
Enter arrow switch round, perhaps 8 as you are not playing the last round.
However if you want to add the movement to a list of custom movements, you need to predefine it in the Movement library.
If you want to contact JohnB, it might be a good idea to email him as his post is 2 years old and he is unlikely to notice your reply.
Mirna