Just curious as I consider voyaging into brass steamers, its seems some of 3rd rail's locos exibit a random cuff issue where a rogue chuff or two sneaks up inbetween the normal 4 chuff pattern.I know some forum members have complained about this problem on 3rd rail locos tht were new out of the box. Is this a "defined problem" that needs to be repaired or is it rather a "characteristic" of the electronics design? Theres a random lowspeed labored chuff that sneaks in on this video right about the 10:00 mark,sound like somebody gets shot on the train.