>>21475456
unless the guy roasting it is the guy sourcing it, your breakdown of the job doesnt make much sense.
but that is certainly a possibility.
>>21476095
try a flat bottom brewer with a low temperature and shorter ratio, like 1:14.5.
>>21476746
the metal aftertaste is a factor, but a minor one. a bigger one is that mesh allows through more oils and fines compared to a paper filter. some folks prefer that presentation however. also they can be tricky to dial in bc they flow fast but clog easily ime. paper filters are much more popular so youll be able to find a lot more advice and help on using them compared to metal filters.