I live in Germany and today ordered from this site http://www.mind-machines.de/index.php/cPath/24Андрей Патрушев wrote: In mindmachine DAVID and Procion glasses, seems to combine the effect of the pulsations and ganzfeld effect. But I have not tried. Davids too expensive and produced in Canada by the firm, which is very difficult to deal (out of five attempts of the order, failed, none), while Procyon has not yet entered the market (it is expected in December).
mindmachine DAVID PAL36 Mentalsystem , at the same time wanted to order and the mental game, but since it temporarily has not appeared in the directory, phoned the owner of this online shop. In conversation with him revealed that he has a very close and good contact with the canadian firm.
I remembered this post from the forum may You ,Andrew, this information is of interest and relevant.
The site has a contact phone number of the owner and he would gladly have answered all your questions.