Set slicer wall thickness or number of perimeters so that the "arms" and "teeth" of the wrench head are solid. No infill or supports are necessary. PLA is plenty strong enough and the print is not layer height sensitive. The wrench is narrow enough that it can be used on either side of the plunger nut, whether or not the plunger is mounted to a bow. The skeletonized holes can also be used for passing through a 5mm Allen wrench for extra leverage and torque, in case your plunger is somehow very stuck on. The wrench seems to be able to handle more torque than the original Beiter one, but I do NOT recommend using this additional torque for installing the plunger! Only lightly tighten the plunger to the bow. The extra torque is useful in case somehow the plunger becomes stuck over time, which may happen if you don't regularly remove your plunger between practices.