About this 3D model

TinkerCAD is no longer going away in April!.YEA! it's going away in August..sigh.. in celebration? a little Star Trek style ship not based directly on anybody else's design, just one I came up with as I was doodling. three parts- upper and lower ship's hull and upper warp nacelles ( all hail the great Bird of the galaxy, Gene Roddenberry! ) as always ANY comment positive or negative is Greatly appreciated ( how am I going to know if I screwed up if nobody tells me? )