Have not had a simple flip pin Cabrinha QR fail closed yet from 100s of uses.
My tips would be:
1. Shorten the rope as much as possible, it’s smoother
2. Try a Ronstan 41100 pulley, its smooth, connection rotates, and no sand in bearing
3. Shorten QR-to-pulley connection as much as possible, gives more/easier throw
Been using it for 4 years and found nothing better yet (I'm obviously not a freestyle rider)
viewtopic.php?p=962422#p962422
I have since made the QR-to-Pulley even shorter by removing the metal ring and just using
a 2x thick 7/64" Amsteel buried loop sewn tight.
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