Have decided to give these a go, never used before but have got a slate for to do, it's on an architect's house, so you know he is going to go over it with a magnifying glass the second I leave so trying to be super sure
Ferramentaweb are advertising a 'new' block clip at the moment, slightly different design but still compatible with the original wedges and they're even cheaper again. I've ordered 2000 to try. I've tried both the Block and the RLS and I think the Block ones are more robust and better value.
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