Yeah you could add anything you want as a modifier, this is good idea, online ordering has upsells built in but you don't really have any control over them. If you already have a 20pc wing on the menu when you add the modifier you could choose add new modifier from existing item and select the 20pc wings, this will link it with that item so that if you 86 wings for some reason the modifier will be out of stock as well, it would also bring any modifiers you have attached to your wings along like sauces. Also I think this approach should report accurately in product mix with the other wings sales, but I'm not 100% sure.
I built this for example
And if the regular wing items are out of stock the mods will be too, Also all wing modifiers are already attached without having to do anything else.
