I have a machete with a soft'ish nylon webbing sheath which I would like to make in to a hard sheath. (I carry it sort of half in the top of my day-sack with the hhandle over my shoulder. Before the fnaar fnaarr have you tried shoving a viagra doen there does anyone have any iddeas please? I think there is something to do with glass fibre that might do it, but I know less about glass fibre than I do about nuclear physics. Thanks in advance.