1.25" Coupler Breech for Marshmallow Blasters

Update 10/16/19: Small update, added a bit of spacing to the hinge to adjust alignment, changed the "tooth" that snaps into the blaster to clear just a bit better but it needs support now, and added some grooves for z seam alignment to make printing a bit cleaner. There's only one step file now for the 42.2mm version and then an F3D file that will cover all three sizes and variations and has some sketches premade for easy ID adjustment like just cutting sketch10 downwards to get 42.3mm or 43mm I