Quoted from Pecos:I got my diffraction grating today. The pictures do not do it justice. I was going to use double sided tape, but changed my mind and went with clear shipping tape cut into thin strips. I only taped down the sides. That seemed to suffice.
The diffraction grating adds depth and splits the white light into a star pattern and all of the colors of the rainbow like a prism. It was certainly worth the eight dollars I paid for it. Here is the eBay link again if anybody wants to order one for their Future Spa.
ebay.com link
I certainly appreciate you posting your experience, review, and link on this, but how close to the original effect do you think it is? Bang on?
I'll be ordering a piece. I could have SWORN that it was on my backglass when I got it, but I have the backglass stored safely (against a wall) and it's missing.