I tried out meshy to see how well it converts crappy hsnd sketches into 3d models. I have to say, it works very well in my view. I used two sketches which I allready uploaded in this forum ("design contest"). Of course, the single fuselage looks very chubby, but this is my fault. The models cam be (for pay) downloaded as STL files. They could be printed as is (not worth it) or be used as reference in the background to make a proper CAD model