RE: Laser 3D
When I first put my hinges in the glue didnt set so they all had to be replaced. I opted for CA hinges b/c I had some laying around. If you can get some epoxy up in those holes you can use that. I would pin those hinges in as well just as a precaution. A regular pin works fine but I always go with toothpicks b/c the glue will bond to them for an extra hold. It looks like crap though.