Bottoming out and o-rings don't seem to help, a little baffled

[alexcr]

I'm using a Keychron Q3 Max with Keychron OEM PBT MX Style Keycaps and Cherry Clear Switches.  I've equipped the keycaps with WASD 40A-R O-Rings.

However, I'm still frequently bottoming out, and the o-rings don't seem to make that much of a difference.  I even tried "doubling up" the o-rings, and it doesn't change that much.  Only when I "triple up" the o-rings does it seem that bottom out is eliminated, but that's not practical as it causes issues with keystrokes registering.

I'm a bit baffled by what's going on here.  Do these keycaps and o-rings just not work well together?  Do I need to try different o-rings?  Is there something going on with these keycaps, e.g. maybe their stem is too long, and maybe I should try different keycaps?

As a little more context, I have finger pain issues, so I'm quite sensitive to bottoming out.  That's why I've always used o-rings, generally with success.  So I'm confused as to why they don't seem to be working as effectively here.

[zegonix]

The O-Rings purpose is to modify the sound and feel of keycaps, they don't magically silence your keyboard or prevent bottoming out. They add to your keycaps mass, that is all they do. To prevent bottoming out, they would have to restrict the motion of the switch, which is what you observe with 3 rings. But since they are not designed for that they stop the switch to early and the activation is hindered.
If you want a soft bottom out, use silent switches. They (usually) have silicon pads on the stem, absorbing the shock of bottoming out (and also on the up stroke (for most silent switches)). Be careful with silent switches of Haimu and Wuque Studio as they have products design to reduce the softness introduced by the rubberpads.

[MoneyDeletionSpeedRunner]

Get a set of silver switches, they actuate very early around 1mm from most brands I can recommend getting some springs as well to find what suits you, I had kailh speed silvers that actuate at ~40gf and that sometimes caused key inputs while my hand was resting.

[alexcr]

Got it.  How about Boba U4s, which I believe are silent switches?

[zegonix]

if you enjoy good tactility, the boba u4 are brilliant. they are indeed silent and quite soft on both bottom out and return, due to the rubber pads. they have decently heavy springs and might need some getting used to though. (this comment was typed on boba u4 in fact )
'silver' switches (cherry marketing), usually called speed switches or something similar are an option, if you want to type without bottoming out, i.e. stop the motion before full stem travel. personally i hate them, but to each their own.