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Sometimes problems arise if the mfg makes pavers that vary in height by +/- 1/8" - this gives a patio ample opportunity to have spots where an edge will get rubbed hard by the plate, making a scratch. Lucky you if you don't have any mfg's like that.
Also, some compactors have these hidden spots where a rock seems to pop out of the compactor from nowhere just as you're turning over it.
So we use a pad. Why not use some cheap insurance on your projects?
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