I wanted to set up a list with checkboxes on a reminder column to remind people to continue with their application which could be ticked and then returned to the controller to update the source applicants table. After much searching I found the answer, create a virtual table which takes the data from the source, send that to the page where those requiring reminders can be ticked, then, on return, put it back into the source. Works fine.
The following is the beginning of the CheckBoxItem Model: