So I just finished replacing the belts in my beocord, except for putting it back together. I found two loose wax paper insulators (3x8cm) between the main board and the one below it. I think one of them was between the power resistors close to the mechanism and the upper board but I have no idea where the other came from. Were these stock? And if so where should they go and how do I affix them? I have not been able to find any mention of them anywhere.