Just got my prototype back. It's 21 mm tall. I'm very pleased with the results except for the missing hole in the inside. I'm guessing that the wall thickness was too small. With the flange inset on the bottom, the thickness would have been less than 3 mm. I'm planning a redesign as two parts. The first is the valve handle with a very small pilot hole in the bottom. The second is the pipe section with a hole all the way through. Can this be printed?