I can say that QC from Clear Matrix bubs is really sub par.
When I went to one of my local LHS that carry Möbius , they didn't have any available at the time. I asked for one and 2 weeks later they had 4 available. From four Clear bubs, 2 mouthpieces were crooked as much as the pics shown. The other 2 were ok but they were noticeable different in size, shape of bottom bulb, size and shape of bottom weld perc, and worst of all, mine was the flattest at the top of the can, the remaining 3 dewaar joints were like volcano cones above ground.
I was really lucky to be able to choose and water test before buying. I checked for bubbles and bad welds too. My Matrix perc was 2nd on best firing all slits at the same time.
Unluckily the best firing Matrix perc, was the crookest and weird assimetrical looking one.
Either way I got lucky getting the best of a batch of 4.
Not good for Möbius QC.
1 good out of 4 is a bad stat.