I think cap off only if its a flavor that has flavor extraction left overs like alcohols. So if it has a chemical taste, I would go 24 hours cap off. Otherwise just wait for the various flavors to mix at a molecular level. So if u can taste distinct flavors fresh, after shaking and setting and shaking and setting for several days it becomes a singular flavor. So ry4 goes from tasting like vanilla and carmel with a peppery tobacco that finishes sweet with almost a hint of chemical morphing into a vanilla honey tobacco that blends all together. Takes about 10 days to reach perfect for me. But within a few days it starts to lean that way.