Tensioning device for catenary pole.
It fits to pole made by barspin. http://www.thingiverse.com/thing:513391
The tensioning device is a snap-on, see the last image.
It is not perfect, but on the garden railway in 1:32 / 1:22 scale, I think it works well and adds some details to the railway environment
I placed manually support at the break wheel bracket, so it does not tip down
The two pieces that sits at the bottom of the pole, should to be broken off and glued to the back of the holders that go around the weights.
For Pulley wheel axle use a piece of filament. Squeeze the ends with pliers to hold the shaft in place.