[Chimera-users] drawing a symmetry axis

Hi, i have a protein dimer and i would like to show the symmetry axis. I found a script in this mailing list: http://www.cgl.ucsf.edu/pipermail/chimera-users/2008-October/003140.html which works quite nice. But i would like to have a nicer representation of my symmetry axis, not this two slabs. Just a line or thin rod would be nice. Does anyone know how to do this? Thanks, Philip