Remixed from: https://www.thingiverse.com/thing:3372914

The groove that locks the pcb has been minimized to reduce interference during milling. The body has been strengthened and the gaps reduced to be able to fix it to a wooden surface with normal screws (better with washers).

This vice is suitable for 50x70 copper. For larger sizes, a support under the pcb is required. For example, this is specific for 70x100 and has an integrated support surface: https://www.thingiverse.com/thing:4160990