Bookbinding cradle and piercing guide — PierceVale | STL + STEP | JLF-237

DIGITAL DOWNLOAD — ONE PRODUCT STL, matching STEP solids, standalone CAD source, renders, instructions, validation report and personal-use license. No physical object included. Bookbinding cradle and piercing guide — PierceVale JLF-237 · version 0.1 Design: João Lutz / JoaoLutzFilm, developed with AI assistance. PURPOSE Support a folded paper signature while marking five sewing holes. An integral V cradle avoids interlocking loose supports; a removable guide registers at one end and can be lift…

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