It works! After trying (and buying) a few media apps the subtitles work. They display at only one point but I think making them show up where your looking is a deceptively complex problem to solve.
The interface takes a bit of time to get used to, but it's incredibly powerful once you understand it. with the amount of custom formats and ways to tweak output I bet there's no 3D video this thing won't play.
Thanks you very much!