These Barnes Products‘ adjustable mould boxes that allow one to easily size the walls around a sculpt are pretty nifty. I always like looking through their sculpting, moulding and casting supplies, although I don’t have much call for them. The times I have, they’ve been very helpful. I also like their online tutorials, and they are now running courses. There have been a few in nearby Queanbeyan, but only in resin jewellery. Now if it was in casting silicon or something like that I’d be right there!