Sub 50 is doable at STA from White, hot putter and good winds on keyholes to reach some par 4
Once you guys get all the good stuff and practice alot, you will to be able to shoot those low scores, myself and the likes as BiB, Genorb, Suncity, Steveharkin etc play ALOT, but to shoot sub -18 on a round, you really need to have a bit of luck and a hot putter.
Top players make mistakes too, but if i hit a bad app shot, im still usually within 25ft of hole and as said before, a hot putter, top players recover from those shots.