docs: correct therapy modes, Calibration steps and smaller errors - Introduction: regular mode shuffles each cycle; Noisy is mirrored; lists Hybrid, Gentle and Custom. - Calibration: how to open it, and the Primary/Secondary Glove rows. - Part 4 buzz-check taps the button for the port in use; Part 8 explains why a mis-ported tactor only shows up by finger. - Fixed config.h line refs, the enclosure requirement count, and a parts list item that doesn't exist.
docs: correct build to solder-free (friction-fit wire plug) The tactor's wire-to-LRA connection is a friction fit made by the printed wire plug (Part 4, Step 2), not a solder joint. Rework Part 3 into wire-lead prep, reword Part 4's "tinned wires" to bare, move the per-tactor buzz-test to Part 4, drop the soldering tools/consumables, and add an optional wire-tinning note. Update every "only soldering" claim across the wiki to "no soldering."
docs: remove v2 build PDF and video links, fix Home heading Drop the earlier-generation build video links (Home, Introduction) and the v2 build PDF link sections (Home "Earlier Hardware", Parts and Tools List "If you have earlier-generation hardware"). Keep v2 context that steers v3 builders away from mistakes: batch-flashing generations warning, the old ABS case is not a substitute, the earlier cost figure does not carry over, and the thumb channel note. Convert the Home subtitle from bold text to a heading (MD036).
docs: fix soldering claim, label build video as earlier-generation hardware
docs: fix Introduction soldering claim for v3's assembled PCB
docs: add v3 introduction and spring tactor rationale