Ok, so you have not only chosen the inferior system but you have doubled-down by being disingenious about a competing product through your attempt to spread misinformation about it.I've read of 2 accounts of kubi popping apart and I will fully lay blame on the user for that. I really have no idea how that could happen unless they jammed their ham somewhere and raked the rings across a hard corner.
I don't think I've ever read anything about the Rolock system cracking. I just did a quick googling and found nothing about it. But other plastic ring systems that isn't unheard of.
Nice.
-Z