I had some issues with my Soundsmith Straingauge SG-200 and a very very fine version of its exchangeable diamond (a "Nude “Optimized Contour” Contact Line/Ruby Cantilever"). It is able to retrieve breathtaking detail and resolution out of the groove, but this stylus is a little ueber-delicate regarding exact tracking-angle and azimuth and should be fitted to mechanical very stable hi-precision arms. Both parameters are lacking a little in consistency on the WT-arm.
I would say that the arm is not perfectly suited to this specific cartridge (the arm is working, but you are forced to re-adjust daily to get stunning results and the most out of this great pickup). But the Arm works very fine with others i have available (Ortofon Jubilee, ZYX Yatra).
cheers
bernie