Are there techniques that will help when I assemble my dust collection piping?
Buy a pipe crimper. If you have a pop rivet gun, good. If not, self tapping screws work, but aren't as good. They tend to be sharp and can grasp onto particles in the air stream. Never rivet or screw in the bottom 1/3 of the pipe--this is where all the dust settles when the system is shut down, and the screw could snag material on startup, which will cause a clog. Forget the couplings they sell. Instead, crimp the pipe that is being sucked from into the pipe going to the collector.