I’m super glad you’re doing this, as it was something I myself wanted to do! Sounds like you’re taking great care to make it as “authentic” as possible.
If you want DTS encodes of these when you’re done like I did for your PT V5, let me know, I’ve got that whole process much more streamlined now. (Not sure that DTS-HD MA would be worthwhile as theatrical DTS is lower bitrate than standard DTS, correct?)