Here's my recent purchase of the famous Lasonic 931 and Helix 4636. Did a full restoration on both boxes and i would have to say that the Helix was much easy to fix and clean. First time using "Mother's Back to Black" car wax, works awesome on black boxes. What a difference in quality between these 2 Taiwan made boxes compared to Japanese boxes. Between the two, really love the Lasonic but cant stop looking at the Helix.