On Wednesday, October 18, 2017 at 4:32:29 PM UTC-4, wrote:
Has anyone ever got a hydraulic Tost disk brake to work WELL on a Ventus 2CM?

I had a 2CM some years back with same problem.
Its caused by light-weight stretchy bowden cable from brake handle
down to motorcycle actuator (complete with simulated handle-bar for mount).
You can easily test this on ground: block the actuator so it can't move,
then see how much you can squeeze the handle.
Replace both cable and housing!

Hope that helps,
Best Regards, Dave