I'm using a Spot Hogg Fast Eddie XL 3 pin, very good sight but heavy.
I've been wanting to add a 4th pin and been thinking about modifying
the vert. rail, cutting it in half to shave off some weight.
It's got at least twice the travel I would ever use.
Also would like to have another dove tail rail cut down short for hunting,
again to shave off weight and keep the quick disconnect feature.
Thought about buying the Spot Hogg Hunter but I like to customize my stuff.