40:25 This function in many cases is not necessary and takes extra time. It would be amazing if in the future to able to skip this step because marking with cylinder scan bodies does not guve any advantages or benefits in future modelling in exocad. Of course maybe you are planing to make photogrametric implant library aligning in Shining scan manager and then import positions to Exocad? Thank you for your great videos and hope my notes will be somehow useful to you. My regards,