And I get this error when I try to export to STL: "Current top level object is empty. " when trying to export as STL.

Over the top if you have one project with three parts but I use it for all my projects and some have thousands of parts. See https://github.com/nophead/NopSCADlib. It is aimed at projects where all the parts are modelled, not just the printable STLs. Any parts that make STLs are made with a module with _stl suffix to its name.

Captain Al Pilvinis "M/V Driftwood"--Prairie 47 2630 N.E. 41st Street Lighthouse Point, Fl 33064-8064 Voice 954-941-2556 Fax 954 788-2666 Email yourcaptain@earthlink.net Website http://home.earthlink.net/~yourcaptain

You could then edit that polygon to remove all the faces where all points are on the same Z height (IE they are flat on the XY plane). Not sure if it will produce an error if you try to render the STL as it will certainly be non-manifold, but if it works it's highly reproducible... Cheers, Alex Gibson admg consulting edumaker limited .

Took a close look at the package for a new one, and they are rated for only 2000 hours - which is easy to use up in a year in a room where the lights are on 6 hours every evening. Now, using CFLs of any type reduces electricity use compared to incandescent, and that's worthwhile in many applications.

Fisk University News July 26, 2021 Fisk University Restores all Academic scholarships for Fall 2021 In light of this past year and the extraordinary challenges and hardships everyone has experienced, Fisk University has opted to preserve all institutional scholarships and disregard any existing criteria for the past academic year.

Dennis Varza's good point about all of the transAtlantic visitors which we get... "The European Vagrants are another matter. The prevailing winds are west to east so Europe get more American birds then we get theirs.

However, just because it is listed at this width doesn't mean it is easy to tow. I had a 25' center console Sea Cat. Bought it used from a fisherman in Dallas. Minimal boat with console. and tee top.

So I pass that on to the person that started all this by asking about trawler features and selection. On the other hand, I have nice looking safety tread panels that sit in top of my stringers (and a long gray water tank under the center) that force me to squat. VERY uncomfortable, even with the two sets of knee pads I now have.

v=hiHRp0dCJ64> A time constant of 10s (1M resistor) just doesn’t work at all.