# Economy lab — any shape, join at the change

> Interactive page: [`economy-lab.html`](economy-lab.html) · Lessons: [`economy.html`](economy.html)

Same pick lab as [Alternate lab](alternate-lab.md), defaults: **economy** + **3NPS** + **6 strings**. Same **2 / 4 / 6** presets, **4NPS**, crawl mode, and **4/4** updown (peak repeated). Toggle to Alternate to A/B the same shape.

**Scales intention:** run 3NPS / mode maps with joins — see [Economy · scales job](economy.md#scales-job), [Scales](scales.md), [Modes](modes.md).

**Path:** [Economy lessons](economy.md) → this lab → [Alternate lab](alternate-lab.md) → [Sweep](sweep.md) → [Solo drills · economy](drills-solo.md#econ)