Yesterday I downloaded and installed v2.5; I found what I think it is an issue.
I started a new game. First I researched "Continuous Wave Laser Operation" and "Base Defence Laser Turrent". Secondly, I manufactured a Base Defence Laser Turrent. Last, I built the corresponding building (Laser Battery) and tried to install the laser turrent in it. However, I was not allowed to do that. It was only possible after having buildt the first Missile Battery (for SAMs) in the game. It seems that it "unlocks" the installation of Laser Turrents.
If a player is not interested in SAM batteries inside bases, why must he/she build at least one of them, in order to have working Laser Turrent? In my opinion, these are independent facilities and the limitation does not make sense.
Regards.