As a bookbinding enthusiast, I needed a tool to make punching A5 signatures quick and precise. I designed this cradle to eliminate errors: it features a directional arrow to ensure every section is perfectly aligned before sewing. Tested on my Bambu A1 with eSUN PLA for rock-solid fit and consistent accuracy. A must-have for anyone crafting handmade journals and books. I hope you find it useful for your projects!