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  • +1

    I'd msg around and see if you can borrow a sledge hammer, then see what happens.

    If it turns out to be really stubborn then get one of those massive Titan SDS. But it doesn't look like a huge area.

  • I've not found SDS or even Kangos can compare with a sledge hammer or lump hammer and cold chisel / bolster.

    Sometimes stitch drilling really stubborn lumps can help though.

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