Tom
I was thinking of the development of ecobunker sod walling. Maybe a bit more expensive that timber sleepers but if someone is employing you they can afford it
Actually, I have two projects in the USA where we are discussing using EcoBunker at scale. And yes, both clients can surely afford it. It's a bit of a stretch in these two locations, but both courses are trying to replicate links conditions. Also I've become tired of watching guys dump sand back into the blowout bunkers we have built elsewhere, even if everyone loves the look of them.
Funnily enough, we are also building a course in Scotland now, and I don't know if we are going to do any revetted bunkers there or not. We have discussed trying to make it look older than that!