Hi Michael!
Thanks for getting in touch and for using our plugins!
I’d be happy to help you with this.
Unfortunately, there is no built-in functionality to create sub events inside another “Main Event”.
But, a workaround for this would be to create 6 tickets inside the “Main Event”. One ticket would be for the Main Event, and the other five would be for each design competition, stating in the ticket title and description all the necessary details.
Will this work for your particular case? Let me know if you have other questions.
Best,
Victor