never needed an Avid rollamajig. I use Nokon cables which are sealed so have no problems with dirt ingress.

I have Avic Rollamajig in the Remote lock out of my Fox Float RL rear shock and it's absolutely crap!!.
It sucks dirt into the cables and gums everthing up. The shock is away for service and when it returns the remote lock out is gone!!


On the 1:1 vs 1:2 ratio thing,

I've found the exact opposite. I find my SRAM drivetrain more susceptible to bad adjustment. not sure why but when a derailleur system wants to give problems then look toward the cables.