round two... decided to make things as i go along, so that others, potentially may benefit from me wanting to practice, as often as I am able...
started with designing and programming a custom properly vented cap and bung... then a few different end caps to get going and to test the cnc (and the communication between my programming and my friends cnc machining)...
for the first sets of tanks... i matched the profile of the end cap to the caps, to scale