I've done a few of those at AMS, and have always been at the gate prior to the scheduled arrival time. My worry always is that these flights are the first to be cancelled when severe winds are forecasted. Had one cancelled on me in august from DUS to AMS, less then 2 hours prior to departure. But no severe weather forecasted for sunday, so nothing to worry about. Even with a 35 minute delay, the OP should be ok.