This is unrelated to your main point but I've always been confused why people cited an "over the board" ELO. Is your 1600 rating FIDE, USCF or something else? A

This is unrelated to your main point but I've always been confused why people cited an "over the board" ELO. Is your 1600 rating FIDE, USCF or something else? Aren't they not calibrated against each other?