Please can you advise us regarding the best type of plastic for our application. We are forming a 'foot' to attach to a musical instrument, so that when it is put down on the floor, it provides some protection. As well as this, it needs to be of a characteristic that has a spring quality. This is because it will be fitted to the instrument by way of clipping onto a small 'H' section (as a clevice). It may require removal and re-fitting from time to time. Any help is appreciated. Thank you.