@KenCitron See my post here Form1+ laser flare issues illustrated - pics and video for why it seems that Josh just got lucky - and that a simple aperture is probably not an answer.
The main reason is that the laser beam is not collimated, it’s just fairly crudely focused with single fixed lens glued in front of the laser diode, (there are no focus adjustable lenses in the laser barrel thread as there were with the original form1) with the lens focusing the beam to a point approximately 30cm in front. At the laser outlet, the beam is large and square and pretty much uniform with no flare visible, it’s only at about 10cm from the laser that the flare profile clearly becomes apparent.