Ok thanks. Not sure if it would be too complicated to put all classes into one form but I can see how that could work with Field Rules. There would be a lot of fields as there are at least 20 classes. These are the classes here http://mackayshow.com.au/mackay-show-entry-forms/ though the online entry form links are only linking to the pdfs until it gets closer to their show date in June then the current forms will be available. But what is asked for in the pdfs is what I’ve transposed into the forms.
Anyway thanks for your help, it sounds quite positive that it could work with your form for what I want to do.
Sorry I didn’t get any notifications you’d replied. So I need to buy at least the $60 paid version with payment option to have this feature of editing the reservations past and present.