I’m looking to build or purchase one of Brownells Retro 601s. I’m a lefty and I’ve found conflicting reports of brass to face issues with slick-sided SP1s and A1s. Some say they suck for lefties and some say they have no issues what so ever. I qualified with a 601 in basic training back in ‘89 and don’t remember any issues. I’m interested in what experience folks here have had and what if anything (short of adding a brass defector) can been done to mitigate BTF for left-handed shooters using a slick sided AR? Thanks!