Mod test is complete. It's a bit of a mixed bag, on one hand it looks like the original plan will work but on the other hand when you go to a mod page from within the pwa you get the preview page bar along the top; clicking the x will bring you back to the app and sometimes the bar will still be there (though it will go away when you close and reopen the app) I think, based on this, we can either go ahead with this model of mods for now and test out "web components as iframes" later or just test out "web components as iframes" now and see whether that provides for a better mod experience