I am replacing rubber on the lower playfield posts of my AC/DC Premium and the manual shows that the lower playfield has (6) - 7/16 inch OD rubber rings on page 56, item 34. I was not sure if there should be 3 of these rings on each set of posts on the outside of the 3 targets or if some spares were provided with the machine for future use. There were 2 on each side when I got the machine, but they were so worn, that it was difficult to tell if there might have been more previously. They were also stretched so tight, that they were almost broken and some could have been broken away previously. Anyone know details on how many rubber rings are required there on those posts and what size should be used?