About this 3D model

I made a set of bellows for my smallpipes and here are the parts I printed. The outlet pipe has a 20mm outside diameter and an angle of 30 degrees as shown in 'The Northumbrian Bagpipes' by Cocks and Bryan. The clack valve holder fits a 25mm diameter hole and will need a piece of leather or silicone or something attaching to make it work. The belt loops and outlet pipe were fixed in place with M3 set screws and pronged tee nuts. The otherend part has an internal diameter of 13mm.