i tried a pair with kowal balltop shafts.
the joysticks ride over little bumps, as they move between the 8 positions. these interfere with the round, sweeping movements that are crucial in robotron, although others have reported that they enhance the play of some games.
you can remove the bumps with sandpaper, but i still find the joysticks sluggish. i can not perform the movements i want as quickly or as accurately as with my happ P360s.
with or without the bumps, i was unable to achieve decent scores in robotron using the suzo inductive, so i gave up on them.