Hi, I am considering getting one Avenger, but have a little concern. Unlike the reference version, the standard Avenger does not have a speed controller. How one can be sure if it runs on the right speed? Also, anyone here has actually used JMW 12-3D Reference arm, which one of these carts would fit best: Phasemation PP1000, AMG Teatro, Dynavector XX2, Clearaudio Concerto, Ortofon Candeza Black, Ortofon Winfeld, and Transfiguration Proteus? Grateful for your advice.