If one can make a tank and then apply enough polishing so much that it removes the surplus metal like couple of tones, it may actually fly.
The basic polishing could take 10 years to remove a tone of metal, the polishing of fluids is a different matter.
If you look at SU-47 from a distance, it looks like it could be a good anchor for the KUZNETSOV carrier.
Do you know what I mean?
Only if you know how to use a grinder.