Work in progress (of course)
Based on ScottDee's GREAT model- if you're want to tip - be sure to tip him! https://www.thingiverse.com/scottdee/about
This BT-50 "Tribute" scale version of the Saturn V should fly well on a small 18mm motor - maybe even a 13mm A10 (will be testing it)
It uses a clear plastic bottle cone for added stability.
At least that's the theory.
The Escape tower is made using a single strand of filament.
Stay tuned for more updated information, I'm post this now for those modelers who want to get started sooner.