They probably chose K55 because it was common and readily available, they probably got a pretty nice price on it plus they were probably happy to use a brand name product that people could associate with since they were a new company at the time. You know, common sense stuff, not copying. If they wanted to copy Brunswick why stop at the cushions which nobody can even see while hidden under cloth? Why not use Formica rails, metal pocket castings, multiple piece long rails, etc??? If their goal was to copy Brunswick they didnt do a very good job.