maybe im blind, but after learn skill in the middle tech tree, after i learn horrizon mod, i cant find it in shop. i think it maybe same situation with some other mods. but just that one issue so far
Same to Blink system. He no apear in the shop.
Horizon Module is unique [Passive Module] with name “Rangemaster” Module , the function is add your ship weapon range, yes…
while blik system… i dont think found any device related to it yet…
after 1 hour i noticed that Courina,. thanks 
anyway, names should be changed, if they are different, there is a chaos… and that bring questions like mine.
imma sez , they should keep the “red square” requirement on each research item, but instead it become blue if that tech researched already… so we know item we use come from what tech… not just item we put in our plan list…