[Electronic M]

With Ion traps you adjust rotation then fore and aft for max brightness...If neck shadows or centering issues occur occur try to fix it with positional adjustment of the focus coil first and only try to fix them with the ion trap as a last resort.

Double magnet traps like yours only have one 'front' side (be sure not to reverse it). But single magnet traps can use either side as front and sometimes work best if you swap front and back (the rotational sweet spot will shift 180 degrees when you flip it). I mention single magnet as they are more common and if you own enough sets you will run into them eventually.