Its hollow so no infill unless you need to add single extrusion infill. maybe too larger for some hobby 3D printers. successfully printed on Robo3D R1+. you will need supports. the screw washer is optional. any M3X10 or M3X13 will work with the washer on. or choose shorter screws if you dont use the washer. print strap clips on their side (see image). print wings, main jets, nozzle, and caps vertically. you can use any strap, i used a black lanyard that was long enough after cutting. Hot glue to fasten the nozzle and cap will do, i used liquid electrical tape since that's all i had lol
if you scale, make sure the tolerances don't get screwy :)
Successfully Printed on Stratasys (obviously) lol and my Robo 3D R1+ at home.