Up close (say within the first foot or so) the beam is a bit wider. But once you get further than that away from the light source, a position offset of 3/4” or so doesn’t really make a lick of difference.
Garry has a few disassembly pics at the end of his first post in this thread (as a side note, I see his switch also had a debouncing capacitor+resistor… they must have changed to software debouncing later on). There might be more pics later on, as well. Good luck with getting it apart. You’re trying with the USB cover tightened down towards the emitters, right?