The best size buffering pad for Flex Plate 5"

[ESSO]

What is the best size buffering pad for Flex plate 5"?

CCS 5.5"
CCS 6.5"

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I have some question about MG pad.

Now i use LC ccs, Curved edge and I never use MG foam pad, How to different MG and LC pad ?

what is batter than? I want to choose one product.

Thank you