I'll try that. (I also read that someone turn down phasing/pulse - need to read up more on that.)
I found that I need to make adjustment to the top tray - and hence that it would be nice if the extension could rebuild the components it created previously. That way I wouldn't have to reposition everything. But that would require some more work to set up link between the parts.
Not yet. As I was working on this last model I realized it was more complex than I first though. Need to ponder some on what solution gives a good flexibility vs ease of use.
Not in this case. The laser I got access to now is a Full Spectrum Muse, using RetinaEngrave2. It prefer PDF. Actually doesn't look like it accept DXF (which I find very surprising.) So what I ended up doing in this case is importing the model into LayOut. One page per sheet. Then exporting as PDF. (Though I could have exported DXF if the laser accepted that.)
One annoying thing I ran into was that I wasn't able to pick a page from the PDF. So I had to split it out to a PDF per sheet.
Though, in the past, for another laser I used the DXF export. But I'm not sure if I used the 2D exporter. I think I just drew everything in SU flat and used the 3D exporter.
I find SU to be rather nice to draw up for laser cutting, as it automatically merges lines. No overlapping lines which cause the laser to cut twice. Though some care must be made when handling circles and arcs.