There is a set of 18 videos where the use of Kiub is explained (from memory the first one or the second one)
For the locking problem, you have to wait the target to be within a certain radius...in other words, target has to be closer to be locked
PS: if you like this awesome mod, you can give a shot to my Compilation that gives OM+OMEGU great enhancement:
https://www.subsim.com/radioroom/sho...d.php?t=240804