maybe it has to do with loading an incomplete/invalid one? (I had to save and come back to finish it) I don't know the problem, I just added a variety of weapon types, filling more slots in each facing than given for free. I don't know how to add additional fire control to make a valid build. in the middle of this, I had like 6 lrm/20's and added artemis v to them (do u only need 1 for each bay? I know u need one for each type of launcher) but later added more lrm's. however when i double clicked to expand the bay's the new lrm's didnt show them having artemis's so I removed them and wanted to reattach the artemis's so it would display all the lrms having them but it wouldn't let me. btw I accidentally overwrited the save with a different build.