I'm soon to begin brewing BIAB 3 gallon batches. I will probably get a catalyst 6.5 gallon fermenter with trub valve. Is that too large for my 3 gallon batches? Seems nobody makes a nice 5 gallon 'total' conical with trub valve! And all 3 Gallon versions I see are only designed for 2 maybe 2.5 Gallon fermentation. The yeast will make A blanket of CO2 the cover of the wort however do you think the 6.5 gallon is too a bit overkill? Wanting To eliminate transferring to a secondary So purchasing with trub collection valve. Thanks!