Interesting comments, for this reason I would recommend the 3 point rega arms such as the 202, 303. These are less deep and work well with the soundsupporta arm board
Here is a pic of a 202 on an sl150 using a 1200 armboard redrilled for the older 4 screw technics mount.
https://www.hifiwigwam.com/forum/upl...39f964c291.jpg