Very nice!!  I don't know if you know there is an amazingly detailed free model of this ship available for free.  It is scale-able to whatever spheres you can find.  Link below for those of you who would like to make their own.  It is very detailed. 

I have to admit I like your model a lot.  Your ability to make something from almost nothing amazes me.  Your "Bubble Ship" looks like a "Hi-Performance" version of the Bubble ship.  You are still "an effective team" says the "Mothership.