That is a great looking ship.
If it is not a spelljamming ship, I would say it is a planejamming ship.
I have a friend called Loki, who is really into the Planejammer concept. As well as having his own Planejammer website, he is also on the staff of the official Planescape website. I think he will love your ship as much as I do, so I am going to drop him a link.
Meanwhile, I think you should check out Loki's stuff, as it might give you some ideas to raid for your own game.