Here you find the information how to open the trim loops on the C-lines
UP uses high quality durable materials for its gliders. The line material is put together for the respective glider model from a material mix of sheathed and non-sheathed Aramid- and Dyneema lines. Some gliders are already pre-looped on the C-lines. On these gliders, it is necessary to open the trim loops on the C-level after about 20 hours to compensate for the inevitable length change of the lines after the first flights.
For detailed information about the trim loops on your wing, please check the online manual of your glidermodel.
You find a video how to open the C-level loops here
Your dealer can also assist you to open the loops.