With Mantle-1.7.10-0.3.2a and TConstruct-1.7.10-1.8.6b and earlier versions the HUD display for the tiaras new flight mechanics does not display.

Probably something to do with how TCon does it's rendering on the Pre event instead of Post (TCon Rendering), I'll have a look and see, can't promise anything I'm bad on the rendering side.