round silver slotted aluminum wafer-like discs

How many of those round silver (ab 2" diameter and 3/8" thick) slotted
aluminum wafer-like discs are there suppose to be under my '60 TR3A?  Were
they intended as 'support sandwiches'?  Where should they go?  At every
juncture with the frame?  Can I substitute cork (or better) glass coasters?
jk

Thanks,
Paul Dorsey
'60 TR3A