The EMT was 3/4" less than 10' long, one 90º to panel. Single phase, 9 wires plus ground.
This time I got my magic ladder in place and looked at the inside of the Red Dot LB. Indeed there was a rather sharp edge such as you would get if you drilled a hole in a block of metal The back part of the hole seemed to be chamferred but the front wasn't. Perhaps a late shift effort or lack of quality control.
Anyway my caution is to warn you to carefully inspect -- finger test -- these types of fittings before you pull.
~Peter