Thanks. I keep thinking about replacing it, since I've had it for six years, but there's nothing I like better. I'll try a Pivot Mach 5 and Ibis Mojo at some point, but they're going to have to be damn good to pull me away from my Quasi.

 It's a pretty straightforward Horst link, but there are two shock mount locations for 4.5" or 6" and two pivot locations for a rising or falling linkage rate. The rising rate works well with a coil spring and the falling rate, which I'm using in the picture, works well with an air spring.