I love the locking grovers.. on strats and on my lp with bigs..
but I love em without a whammy, too.. fast easy string changes.
NOTE
grover just switched to a model with a knob on the back.. the old ones just had a slightly taller string post.. so now the string post is regular height.. and you have a knob on the back.
the instructions with them are simple.. none.
I don't know if they work like sperzels.. I assume they do.
but.. they told me.. good old wd.. ha!.. they were black chrome, and they aren't.
they are painted black. or at least appear to be, to me.
I was a bit disappointed in that. but they do look good still..
I don't know if the old style are shipping or the new.. the price went up..I'll have to call and check this out..
It appears you string through, cut string tighten knob.. and tune.
the advantage of the knob style is.. with the old style sometimes the string would break close to the tuning post.. and you'd have to dink around to get it out.. I found grabbing it with a needle nose and detuning let it slip right out, but doing that with fingers was harder.. as the string, esp. the e b g were so hard to hold onto if short...
with the knob style, you just loosen the knob and it drops out.
TWANG