D'Oh Moment: Move with Folding Option

@DaveR graciously provided sufficient information to fix my sophomoric “slicing
& dicing” of figure on left to produce figure on right (misaligned faces, non-coplanar issues, hidden geometry…)

Then it dawned on me he was too polite to tell me to start over using the Move with Folding Option. No question. Just an observation. :+1:

Sorry. I was just telling you how to fix what you already had. There are numerous ways to get where you were headed.

FWIW, your triangle on the right has all reversed faces and I’ll guess no bottom if you only moved the central face up using Auto fold.