This is a bullet drop tube designed specifically for the Lee bullet feed system with an optical sensor only , and a mounting bracket to use 3/4" (20mm) square aluminum tubing to allow mounting flexibility and options. Now with both feed tubes for 9mm and .45
Made with these settings to test fit but seems adequate for every day use.
Drawn up in Fusion 360
Being a complete rookie I designed these from scratch to learn how to use Fusion , but were inspired by units in open bullet feeder project.