Huge difference between these and Drop ALT stock stabs, no more annoying rattle and the space key getting stuck on one side. These come in flat, no clipping required. I only used some Krytox 205 g0 lube for the stems and the stabs feel great.
If you do not have any lube, these are still a good upgrade, would definitely recommend.

I upgraded to these from Durock Piano Plate Mount stabs, I could never quite git rid of all of the tick and rattle in those no matter how much I lubed them with g205 g0 and dielectric on the wire. These Zeal's don't require any clipping, they're completely flat and the tolerances are much tighter. All I did was pull them out of the package, lube and install and they sounded amazing first try. Definitely worth the investment!