Call me crazy, but I think @adrian2301’s original lines looked great AND @blanchsb’s current lines look great too…they’re both a bullseye in my believability scale. The connecting fittings smooth over the inconsistency in diameter.
Double check that your lines have applied scale values: CTRL + A –> Scale. If they’re not applied then the curve’s depth value will be inaccurate.
In the end since we all seem to agree that they look good and we’ve been staring this machine to death for 4 months – i.e. we’re honorary 434E experts at this point – I vote we let that be our deciding factor rather than a real-world diameter value.
PS: Awesome video find @spikeyxxx