This is a print in place balisong. I've included a version with and without supports, if you want to add your own. It is also a good reference to know what is a support and what isn't.
Make sure your printer is good with overhangs, this might be testing the limits of your printer.
So far, I've printed with a Monoprice Mini V2 at 0.35mm layer height (yellow) and and Ultimaker S5 at 0.15 layer height (red), with reasonable success. The overhang parts got a little droopy, but a little sanding should fix that.
print_in_place_balisong_v3.stl |
print_in_place_balisong_v3_no_supports.stl |