The Pilgrims make the long journey to the National League outfit (kick-off 3.00pm) to conclude their pre-season preparations.
Gregg Smith, who is poised to become summer signing number 13, could again feature for United.
Marcus Marshall and Liam Adams will be involved too as boss Dennis Greene attempts to finalise his squad ahead of the big kick-off on Saturday week.
Goal flashes will be available on Twitter.