That may possibly be why I neglected to include it in previous recommendations I'd made... But I might take another look just to waste time.
By all means, and thanks the added info.
To be honest, I've been irritated by the whole CAD scene in general... ACAD's too expensive, maybe too bloated, and it's proprietary; Q-CAD is half-proprietary/half-open and they aren't intending to work 3D into it anytime soon, if ever; and some projects are mere gleams in (a) programmer(s) eye(s), dead, bogged or abandoned... I might take a second search for the previously-elusive Varkon... (any info on that, btw, Matt?)
Hey open source CAD programmers! Is there something out there that I've missed, or can you get your show on the road?!