Heleen Klopper's woolfiller

I came across Heleen Kloppers Woolfiller at a demonstration she gave at the V&A gallery. It is a simple and excellent idea. Fill the holes in woolens with fibres of wool containing minuscule scales which open up when they are pricked many times with a needle.Once the open scales bind with each other they cannot be separated! I also think that woolfiller creates some interesting effects like this one >>>>

The elbow patches are something I would like to play with. I watched some lady at the demonstration fill in a holey jumper and she looked extremely satisfied pricking away at it.....