these are single use and can be printed at 15% in pla.
there are instructions for using the jig here.
https://imgur.com/gallery/converting-usgi-fsb-to-clamp-on-olheVnA?fbclid=IwY2xjawMbNsRleHRuA2FlbQIxMABicmlkETE1bnJVcEhwTXZrNUs4NVNrAR5R-mIBQzS-R4XTwSksx8Migiqs7OuHb1hTUYkgbEtRoXXjYXzaG-VRdCXm0g_aem_S0OscOtSx3eXlifDuXddGw