1 Master Form 2 linked Detail Forms

I’m developing an event planner where I have the events as a single master form, the team as the first detail grid form, and the team members as the second detail grid form. The team member grid form is of course linked by FK to the team grid form and is refreshed when you select a record on the team form.
I have done a lot to find any information on this issue, which to my surprise I cannot find.
I would really appreciate a link to a sample or article, or a response if it’s not an option in Scriptcase.