For fans of the FUJIN III full collar lever, IST releases the mid-collar FUJIN III which allows installation on commercial controllers that have at least a 25mm joystick hole cut out.   Note that this covers mainly the Qanba PS4/PS5 arcade controllers.   Hori arcade sticks have a 24mm hole, therefore, will not work on those.   

FUJIN III Details

While derived from the Myoungshin Fanta lever, the Fujin Lever's most notable element is the bottom switch plate.  Instead of dealing with possible manufacturing deviations, which can affect switch performance, the plate allows the switch to be laid flat and stable with additional
screws

Another unique element is the frosted white bat top. Unlike most levers with a 9mm diameter shaft, the Fujin 3 Lever's shaft is 7mm. This requires more travel from neutral to the
edge of the collar

Stock Grommet - IST Black