Step 2Materials
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They are made entirely out of scrap iron, lorry rims are the best for a base, but anything will do. The rods are 1 meter long consisting of 4 * 16mm rods and 8 * 12mm rods. All the rods are old windpump rods. I imagine that even thin pipes would work as well. The rods are 150mm apart. It can go up to 160mm but after that, the feed starts to fall out too easily through the gaps. The support ring in the middle is essential. The top ring I made by putting the tip of a rod in the rim's valve hole, holding the rim securely and wrapping the rod around the rim.