Tube Frame vs. Wire Frame (Performance Issues)

 From:  Chris
Hi all,

I created a rather complex wire frame in MoI which - after applying the sweep command with circles - makes my display acting under barbiturates. Is there a way to temporarily switch back from tubes to wires (lines) in order to increase display performance? And second: It took me some time to align the circles properly to the wires since these are not aligned with the x/y/z-axes. I'm wondering if there's a command to draw a circle which is automatically perpendicular to a wire?