SACD-R

Me, my friend and my cossin all have the best Universal player ever built, the Denon DVD-3910. We all bought two of these in case of spareparts. DVD audio sounds great, SACD sounds formidable. The dynamic is one of a kind. There is nothing better, not even vinyl. These days you can still buy one under €100,00. But the more people know these are the only high-end players that can play SACD-R, the more the price will rise. We also make our own SACD from DVD-rips and HD-Tracs and HD-Vinyl, with the help of the Philips software:
Super Autor. In a german test on the internet, the DENON DVD-3910 Was the best SACD plyer ever tested.

Just one question: does anyone know if the Yamaha BD-A1040 read SACD-R?

I found this thread after googling the term "burn sacd-r ISO to play in a bluray player". I need help.
I have a large number of *.ISO files that are backups (copies) of SACDs. They played fine via network (JRiver software) to a Marantz AV8801 processor. I've moved the hardware to another room and now these large files play with a stutter. So, now I have to forgo the network playing route and simply burn the *.ISO's to actual physical disks (DVD-R or DVD-RW).
The network stutter is completely beside the point here. Here is where I need help.
I've read up on the topic and apparently there are only a few bluray players that will play SACD copies. As I understand it, the makers of these universal disk players were behind the curve on copyright protection for these early models and they of course caught up with the later models that simply stopped reading the burned SACD-R copies.
Marantz UD5005 was mentioned most often as such a player, along with a few OPPO models. Here is one of the links:
https://github.com/sacd-ripper/sacd-...tible-players.
So, I buy a used UD5005, fully expecting it to play a DVD-R with an *.ISO copy of a SACD burnt onto it. But the UD5005 cant read it. And I bought it especially for this purpose. So, what am I doing wrong?
Here are the possibilities:
1) I am using the wrong disk types (DVD-R). Should it be DVD+R? DVD-RW? DVD+RW? A specific brand of disk - Sony, memorex, etc?
2) I am using the wrong type of SACD-R *.ISO files. Is there a certain kind burnt with certain software so the UD5005 will read it?
3) Something is wrong with the Marantz UD5005? It plays regular BDs fine. I have not tried SACDs on it, but I am sure it is fine. I tried resetting it to factory default firmware, then to the latest firmware update, nothing works.
The Marantz says either no disk or unknown disk.
Please help.
Thanks.