I bought the plate-mounted QMX-Clips since I was interested in trying them out and comparing them against o-rings.
QMX-Clip Manual for those interested:
QMX-Clip Manual.pdf (1092.4 kB - downloaded 1160 times.)
InstallationThe clips cannot be installed on
some 2u keys with PCB-mount Cherry stabilizers.
On the KMAC2, there is no space for the locking clip to get between the switch and the stabilizer housing
On the FaceW (using a GON universal 60% plate), it fits just fine:
The clips can be installed on 2u keys with plate-mount Cherry stabilizers but you need to be careful since it is a tight fit and you might crack the QMX-Clip during installation or removal
The clips cannot be installed on keys with Costar stabilizers since it interferes with the movement on the wire
The clips can be installed over 2x3x4mm LEDs and 3mm dome-topped LEDs (these LEDs may interfere with thick keycaps)
UsageThe QMX-Clip does silence the downstroke sound of the bottom of the key cap hitting the top of the switch and the upstroke of the stem hitting the inside of the switchtop. This comes at the price of reducing downstroke travel a little bit:
Left: Cherry MX Switch; Right: Cherry MX Switch with QMX-Clip
I observed that the reduction in key travel is far less than o-rings and that QMX-Clips are more consistent than o-rings. However, inconsistency still occurs due to the different supports on the underside of key caps.
Anyway, I've kept these on the FaceW for now and while I enjoy the silencing I miss the clack during
intense enthusiastic typing.