This beats me. I've used the sealed one with three different fusions from different boxes on the twist 650, all worked fine, and just checked the unsealed avid stealth on one carto, it, too, was good.
On my stealths the carto is not cranked down super tight, but it isn't at all loose. I see maybe 1mm total gap, from carto flange to the adapter flange, can partially see the air inlet holes below the 801 threading.
On my stealths the carto is not cranked down super tight, but it isn't at all loose. I see maybe 1mm total gap, from carto flange to the adapter flange, can partially see the air inlet holes below the 801 threading.