Thanks. 
I need two different actuators for my breaks, like the big ones I need a driving and a parking brake. 
But i won't two bowden cables. Therefor i've made a central platfrom between the frame. Later truly invisible. 
A simple sledge to hold a constant direction. left to the actuators . right to the drums.
the testing arrangement was simple and ugly. 

that must be prettier. 
to get a weldeable bowden tube in my tiny sizes was impossible. so I've bought
a really small tube stainless