Dont know if somebody else has already figured out these but anyways
Been tinkering with Page Default Hud script and so far has managed to enable heading gauge and orders bar. Heading gauge is kinda small and as far as i know, it isnt interactive. Been thinking about possibly making it interactive and making it a bit wider so we might have relatively decent way to change heading via UI while keeping the stock UI look
Another thing is orders bar. It could be used the same way as officer icons in SH3