Test results of converting complex solid/manifold 100% quads surface mesh object to different NURBS formats.

Simplier objects gives much better and accurate results, so much more hard surface object was chosen for test.

Results:

370 Mb stepAP214_(STEP).STEP
192 Mb IGES.IGS
175 Mb ACIS_(SAT).SAT
154 Mb parasolid_(x_t).x_t
98 Mb solidworks_(SLDPRT).SLDPRT
88 Mb parasolid_(x_b).x_b
73 Mb catia_(CATPart).CATPart
72 Mb alias(wire).wire

4 Mb Blend - as input.