Have colonists killing themselves, which is annoying but unfortunately Earth is in WW3 so no one is going to be coming to replace them. Still holding strong, so hopefully will last until some side wins the war. Trying to keep up electronics and machine parts production is definitely troublesome, I guess I need to figure out a good dome layout - had thought a dome full of residences connected to domes with work or services would go ok, but there's a penalty for working in another dome (I guess commuting via a tunnel is onerous...).