here is my testimonial : the corvair's vinyl have a good contrast, it's true. However it's not a real black diamond vinyl. In my opinion, the results are not the same as for the original black diamond.
I installed the corvair vinyl which improves the contrast. But I find that the rendering is too dark, and that this vinyl havent got a good looking on the playfield (the vinyl have a dark color). So i removed it. On the other hand, the real black diamond was showned by Dri on this forum : the look and feel is incredible (Take a look on his last video on twich, the vinyl have a grey purple color).
https://www.twitch.tv/dri374/video/650743194
The problem is that it is very difficult to find this vinyl. You have to go to screeninnovations.com, then contact a local reseller, then request a sample with a pretext like a project for your home cinema. This is a hard way because usually they dont sell a small surface kit like for our screen on the ST.
anyway, you can go with corvair or you can try to find the original vinyl and good luck to find it !
Quoted from rockrand:Corvair61 sent him funds for some black diamond film And I have not heard anything since,it was not much money but I would like the film,I understand it makes the picture clearer,does it really do anything?