hate to double post, but worthwhile to add - i have two identical machines, except one has the geforce 670 and one has a radeon 6780.

the geforce 670 one i'm not presently using, so if there are any strange issues that need examination, i can just walk away from the machine, contact you guys, and ...

I'm a programmer, not an architect. (C/C++/PHP/JS/BASH).

I run a Hackintosh (10.8.4) with an EVGA GeForce GTX670 FTW 2048MB.

As such, I'd probably be quite useful for spotting edge cases .

Here's two pieces done in Sketchup 2013 and Artlantis, (sorry, I have no Octane experience apart from ...