Machina Dynamica New Dark Matter CD and Blu Ray tray treatment?


This is a set of adhesive-backed thin plastic pieces that one attaches to one’s transport or player disc tray. The disk rests on them during non-spin mode, but presumably don’t touch the applied thin pieces during playback mode. The company says the new Dark Matter pieces reduces background scattered light from reaching the photodetector, thereby improving performance. 

Anyone tried this product? Please specify transport or player if you have and your impressions. 
celander
@elizabeth  I tried the same refrig magnets and yes they do work, maybe not to the effect the ones selling for $600 do (but don't know since I've not compared) but others should try this tweek out and let all know their experience.
https://www.amazon.com/Magnetic-Erase-Whiteboard-Sheet-Fridge/dp/B07CJNTW6D/ref=sr_1_9?keywords=roll...
rsf507,                      
Hey, that is a good size. The ones I used are 13" by 19".Your selection is 15" by 22"
The one I bought claim to fame is a stronger grip, thicker magnet material https://www.amazon.com/Magnetic-Erase-Whiteboard-Sheet-Refrigerator/dp/B01LHNGMZ0/ref=sr_1_4?ie=UTF8...plus 515 reviews, 89% five star. 8% four star, Yours has only one review....
And I’m sure there is synergy between these magnet-backed whiteboards and the New Dark Matter discs. But should not the Whiteboards be Blackboards?