I have a tenor, Arnold Brilhart Level-Aire # 6, from the seventies I think . Has the vertical machine mill marks on the table . I have read the earlier ones with horizontal machine marks were better players . Looking at pictures of latter and comparing to the one I have I cant see any difference ,rails ,tip ,length of baffle etc. look the same . Can anyone who has played both comment on this . Are there differences other than the direction of the machine marks , Thanks