Vitascope | Robotime ROKR LK601 Mechanical Gears Puzzle Kit

A problem with this particular kit?!?

I bought several ROKR Mechanical Puzzles (Starry Night, Magic Cello and Classic Gramophone) for my father, each time to his absolute delight. This one (Vitascope) is puzzling him (pun intended)… The pins that always are very tightly fitted to their holes in each puzzle, fall right through in this one… When you know how perfectly engineered these puzzles are, a thing like is very surprising and could affect the outcome. He started over 3 times the first part of the puzzle because he thought he had made a mistake at some point, but no. He will have to use glue if he wants them to stay in place in order to finish the project which is highly unusual.