Maxrecoil, it seems that you notice the same joystick behaviour but it doesn't bother you
Maybe I'm just too fussy
I grew up using rubber-plug/grommet centred joysticks, and they simply didn't allow for "bounce". If I watch a Happ Competition joysticks from underneath, I watch the activator bounce back and forth (and up and down a bit too) and trigger the opposite switch.
I really notice the problem playing a game like Ghosts n Goblins. But it affects other games as well.
In G&G you have to tap-tap-tap the joystick in one direction while tapping the fire button to get your shots to bunch together. If I do that (essential) tactic in G&G, I often get turned around because the joystick has bounced back the other way. The result of this, usually, is that you get killed. You can't avoid this by "Holding onto the joystick" because the response would be too slow.
It might not be a problem in Streetfighter-style games or shmups, but it is for heaps of others.
ANYWAY, the effect of my "shimming" is that the joysticks don't bounce about as much, and I don't have that problem in G&G now. It is a much better compromise - the joysticks feel a bit stiffer now, which is a good thing, but not stiff and clunky like a Magstick (I have used these too). So they are more in-between , which is a good thing.
With shims, the 8-way Happs feel much better on 4-way games too. I'm actually really happy with them now.
I want to experiment with a thin rubber shim under the metal one (the metal one would be in contact with the spring). I think that this would improve the feel and action a little bit more again. But I'll have to visit the specialist rubber store tomorrow to get those