Deejay - Tks - a damned good idea.

The "crusher dust" seems to be used mostly to bed & top the pipes when they lay / replace them; but gets spilt all over the place as the put in the trench with a loader bucket.

But you are a genius - I think I will give them a 6 pack at the start, on the condition they don't spill their "rubbish" in my grass coupled with an offer another 6 pack if they live up to their side of the deal and if they get some proper topsoil to cover the trenching wounds.

Afterall a couple of 6 packs is less than 1/2 the price of a new bedknife!! and I have nothing to lose.