Clio09.
I read info on the Scheu tables a while back and noticed the motor -pulley configuration. I can understand your problem with the vibration with your table. It sure seems that mono would be the ticket for your table. Mono acts more like a spring and vibration absorber that would enhance the performance of your table.
When Harry Weisfield suggested I use braided spyder wire it was based on the fact that he knew I was going to use 3 HRX drives. Each delivers the power to the table via a 15 lb flywheel that won't be prone to vibration problems that a lower mass drive system does. To each his own.
I remember the Weathers turntable , arm , and FM cartridge that I first heard in 1956 or 57. A clock type motor driving a platter around a few ounces at most, using a balsa wood arm, I think. Back then the the sound was great when comparred to the other outstanding tables of that era. Garrard 301s, Rek O Kut idler drive with huge Hysteresis Synchronous motors and Thorens TD 124s. I know I've forgotten a few. I still own 2 of them.
I hope your time and trouble will pay off for you, let us know your results.
Ken