Five long-form guides, each carrying the arithmetic behind the craft: the stitch, the knot, the plait, the wrap, the doubling.
The two-needle seam: the spacing from the real pricking irons, the thread at spacing ÷ 6, and the formula that never runs short.
Guide 🪢Tied on the mandrel: bights and leads counted before the cord is cut, the gcd that says how many pieces you need, the grid walked pass by pass.
Guide 🪢The overlay and the taper: the 4.6× strand rule over a core, the bellies that build the belly, the fall that finishes it.
Guide 📿The wrap cord and the bracelet size from the tools' formulas, with the paracord widths measured and the mistakes priced.
Guide 🪢Doubling a Turk's head: the row coding that names the family, the crossings multiplied, the coverage counted before the cord follows.
The arithmetic behind each guide is worked in the news, and the calculators live in the tools. The blog feed: data/blog.xml.