Just a test torus stretched in blender which I printed and enjoy so thought I'd share.

Technique:

• Make low-poly torus
• Cut square patch of vertices out of it
• Select and scale that patch with linear fall-off 
  • to achieve feasible print ramp (~60% w/ bridge at tip)
  • to match your target shape (here a test rectangle-ish thing)

Useful to patch into other models, or demonstrate to friends how print in place joints work with a tiny keepsake (size of dime).