[MissMinerva]

I read something somewhere where the person took 2 plastic needlepoint grids, cut them in circles, spread riccia over one and covered it with the other. Sort of a riccia sandwich. Then the edges were stapled together. Small stones or gravel were then used to hold the edges down.

I have no idea if that is what Oliver Knott is doing here but, I'll bet that works good!

Jan