Hi Michael,

Thanks for the precision explanation, it makes sense.
Here's the original .3dm and the .dxf output.

Units in MoI are Cm, in Modo I use metric/centimeter unit.
Using the MoI lwo option : Scale output unit in meter, I have perfect scale result when exporting geometry in .lwo format.

However, when using the .dxf, object comes 100* bigger in modo, so a 30 cm length curve = 30 m in modo.
Maybe this scaling difference is the reason of this loosing precision problem.