I'm full of happiness to see the first baby steps on the HUD, but I have to say that graphically lags several generation behind current military flightsims:
* HUD is a projection, and therefore is not completely opaque, neither is affected by shadows.
* Because is a projection focused on infinity, the image is optically collimated, and therefore it looks like "fixed" in relation with the world (it's not affected by the PoV)
This is what a state-of-the-art HUD in a military flight sim looks like:
(When moving the difference is more prominent, specially due to the collimation effect)
This is a generic critics about the FG HUD representation. At least the collimation effect would be nice to have, not only for Shuttle but in general as well, otherwise I don't see how the runway point markers are going to work properly.
Regarding the specifics of Space shuttle HUD, I think lines are too thick and numbers too big. Just as reference
Also regarding the typefont, you can first try with
Larabiefont, it fits well although no perfect, but definitively better than the font you're using.
I can't wait to land in KSC in a CAT III approach with the shuttle using the synthetic runway representation in the HUD! Although as I side note, I think Shuttle HUD was never certified as a primary flight instrument.
Regards!