Custom font (PRS+) breaking itself

So far I have attempted every single suggestion and tutorial regarding changing fonts in epub's via PRS+ that I could find.

I can get the formatting to work, the font does not.

I got it to work once, then I change books and it stops working. :angry:
When I say it stops working, the font returns to the default, no matter what I select. Nothing I do will make it work again. I have resaved the css file, I have renamed everything related.. nothing works.

I am using an epub I made myself in Sigil, it has no fonts. It is only a few lines of text.

I believe it has something to do with the filesystem. /Data/fonts has not worked at all. /fonts works once. Of course I have tried different fonts.. everything I can find I tried.

I just got this today (PRS-350), I did the update and installed PRS+, no issues with that.

Please help if you can... this is driving me insane. I have been on this for over 7 HOURS :help:

Every time I open the css file in Notepad++ it identifies as UTF-8, as I was unable to save it minus BOM I saved it as ANSI, I don't know if that is an issue.
I have saved the file using PC and UNIX line endings, in ANSI and UTF-8. (There is a box for Unicode BOM, that is not selected)

PRS+ version:2.1.02alpha

CSS file


The epub I am using:


Please note, I do not want to embed the fonts in each epub as I use different fonts depending on the light level.

Edit: I may have it working a little... Is there any way to add font size increments? The step between S and M is too large. "Font size" does not work either.

Edit again.. and suddenly all of the fonts have stopped working again... :surrender: I am starting to think this POS is faulty. Backed up CSS files referencing still-in-place ttf files don't work anymore, but only in certain books.. that worked before.