title: Single Google Form for multiple Sheets
body: <p>Due to ongoing development versioning, plus seemingly insurmountable problems implementing user permissions workarounds, I need to capture form data linked to a sheet which is not exposd to the users. Instead I want to launch the form from a separate spreadsheet app using a custom menu. Yet despite thorough Google searches, and the tantalizingly named 'FormApp.openById' method, I can't find a way to accomplish this.</p>
  
  <p>I know I'm off track here; could anyone please point me to the way back?</p>