Well you can add on the second arm mount later, too. That arm is butt ugly, but I heard about it recently on SH as well...Interesting to say the least.
I had something totally different in mind than ANY pivoted arm - the Rauna Opus 3 Cantus parallel tracker. http://www.lencoheaven.net/forum/index.php?topic=489.30 A friend , flute player in symphonic orchestra, just got one on my recommendation. He has Stabi S with Stogi Reference arm with Benz Micro LP ( S? MR ? - forgot... ) and had at first Formula IV unipivot arm for his Clearaudio Virtuoso Wood , everything mounted on Stabi S. BTW, this was the very first two arm version of Stabi S in existance.
After he will return from a tour, I will double check and fine tune what he has assembled together - but he is more than happy with Cantus/Clearaudio compared to Kuzma/Benz already. I will take some photos and record the technical and musical performance of the Cantus with a DSD recorder- that should prove to be quite a threat. What I only fear some on the fly VTA adjuster will prove to be indispensable aftermarket add on - stay tuned.