Thanks.
I had concern as well at first, but I sent it to Dre in lossless format and told him not to use it if there was any quality loss in SR comparison tests.
His recent previews use it, I believe. So please do mention if there are suspected problems due to the source! While I was reasonably confident in it, I don't think I would have submitted it to him without more intensive review if I had known the rendering time that would be required for SR.