Are you talking about mixing them (i.e. like front Q-Lines + back Dyneema)?
If yes - don't do it, they load-stretch differently, and they have different load specs.
It's ok to go all Q-Lines or all Dynema.
Q-Line is weird in my taste as it feels almost like a wire. Other than that it's super reliable.
If you take into consideration all the time spent on measuring/cutting/tunning/etc - it is better to just buy a new set of lines.
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