No worries, mate
We or better I released the beta, because it wasn't clear that I will carry on with modding any time soon. I absolutely agree, this version is definitely far from being finished!
Sadly, it is not only a couple of months work..
Well, yes, I'd recommend version 4.0 with its patch, as the actual latest playable version.
Sure, there is no real pressure to finish it, but your motivation is constantly decreasing over the time
So it is always to decide between detail and actually finishing the mod. It is one of the most frequent reasons, why mods don't get finished.
Nevertheless, I am back on track, sadly, on my own, though with some help from Mausolos and M1492 in research.
Many thank's for your praise, very appreciated!
Of which units do you speak, exactly?