uplocking reel seats seem to have become the norm in the last 15-20 years. not sure why, but i'm assuming it has to do with the trend of style that has occured over this time. all of my early reel seats, say pre 90, were all of the down locking style. then as the decades have passed, here we are, almost exclusively uplocking. as far as balance goes, i've always thhought that the dl were fine but as i look at all my rods, they're all ul.