It appears that we are a few welcomes behind.
Greetings to HankKingsley - don’t focus on the numbers, focus on the beer. I try to maximize the yield, too. Trub, as in kettle to fermenter loss (KFL), is not as terrible as it is made out to be. There is a happy medium between transferring it all to the primary fermenter and giving up too much. You will find it.
Hello to MrGammaRay - There is a lot of info on electric brewing in the forum. Read up on it and brew, even if it isn’t perfect it will be good.
Welcome to theBeagle - Brewing is a great activity for those of us who have retired. You are well along in equipment so far; read about refractometers here on the forum before you buy one. Ask what you are actually measuring and how much of a fudge factor is involved to make it useful.
Good to have you aboard, iamthefly. With your physics knowledge you will find that time and temperature are keys to brewing.

Take notes and share what you learn, please.
Hello to Motor City’s Dave, Schaumie2222. You have found a great resource here. Read lots, ask questions when you have them. Someone will get an answer for you. Mind your temperatures and 90 minute mash, followed by a 90 minute boil for good results.
Welcome to Kemical from Argentina. Your chemistry and biotechnology knowledge will help make fermentation easy for the yeast. Read about the equipment you will need, think about the brewing process, start with a simple recipe and get brewing. My son crossed the Andes from Santiago, Chile and drove through Argentina all the way to Rio Turbio a few years ago. I envy him.
Greetings to davidjcoburn from Rhode Island. Many on this forum will not recognise our two-letter abbreviations for states’ names, but I know of the Ocean State, neighbor. As above, keep things simple in the beginning and you will get beer. Ask questions and brew on.
