I have a sneaking suspicion Boar's Head et al. know sandwich making secrets that would substantially improve my lunches.

I mean, you do anything for long enough, you get good at it. Especially if you're soliciting feedback from even more people who are doing it.

I think somewhere out there there's a story of a Brita customer support rep tracking down a filtration engineer to get a technical answer to how long one could filter and drink urine for.