Thanks, Pangakupu.
KGB did a 2D puzzle in puzzle, and Pangakupu has now done a 3D one. Bravo!
I have the eight vertical cube entries for submission.
For one of the across clues, I have not correctly identified the extra word, though I have its cube entry... Well, that does not affect the submission. Will look at it some more.
Good that this puzzle does not have a GK layer, and is entirely within cryptic crossword realm.
Thanks again, jono, for the .pdf