Good levelling advice Chuffa. Always want good ways of getting rid of cardboard. I guess you have to wait until cardboard is wet as it might be a bit slippery at first.

I save all the oak chippings from the planer. I'm sure there must be other joiners out there happy to get rid of a few bags of hardwood shavings.

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Advertising is the rattling of a stick in a swill bucket. George Orwell
Paul