Xtool F1 3 in 1 Jig

thingiverse

This fits into the F1 base (replacing the metal piece) and holds the standard metal business card, the standard bone shaped dog tag, or the military style dog tag firmly in place. I've printed this in "standard" as well as "fine" and there is no noticeable difference in the output (other than speed/time). The edges MAY have to be filed/sanded ever so slightly, but I opted for a very snug fit as opposed to one that would have any play in it.