Thank you so much for the detailed feedback and the stunning photo of the C4U Rainbow Arecibo!
You’re absolutely right—since this puzzle has a complex internal structure, it can feel a bit 'tight' initially, but it definitely becomes smoother after a few solves (the 'break-in' period). We’re thrilled that the vibrant colors and build quality impressed you.
It looks amazing in your collection! We look forward to seeing what your next challenge will be.
Best regards,
