I tried the CSP linkage but the rods were a tad too short for a 2110. I loved the simplicity of it although it seemed a bit delicate.
The hex bar linkage, even with the heim joint upgrade, is still a weak point for me.
Maybe a Berg linkage in the future but I think I'll do a little research on the pulley system. From what I've read on various bulletin boards it is a very sound system.