I understand to a degree how efficiency is calculated. Today's brew had the following stats. Method is BIAB, I have my equipment profile dialed in fairly decently, and have my default efficiency set at 70%. Preboil gravity was 2 points low at 1050, I extended the boil by 5-7 minutes, but my volume fell slightly below target of 6 gallons to approximately 5.9. Original gravity was low by 1 point 1060, was supposed to be 1061. The brew session stats say that conversion was 73.9%, all other efficiencies came out to 67%. Should I care about this? The beer is really good, but I feel like my I should be trying to improve on this.