This is really interesting. I'm not sure whether to rate it good or bad.
The bad is that it's really slidey. Really. Like I think I can shake the carto out of it if I'm not careful, even without PV attached to it. Despite all the slidiness, there are no leaks so far.
The good is that there's a nifty nut holding the carto in place, and it's very firm. Makes it very easy to pull cartos out, and they stay put when you're not changing them.
The bad is that it's really slidey. Really. Like I think I can shake the carto out of it if I'm not careful, even without PV attached to it. Despite all the slidiness, there are no leaks so far.
The good is that there's a nifty nut holding the carto in place, and it's very firm. Makes it very easy to pull cartos out, and they stay put when you're not changing them.