#46 and #47 are too similar to an automobile logo. I like the direction with more pronounced angles instead of curves though. Please try something else.
#20 and #42 are a little too fluid. It needs to have a stronger presence and not as curvy or wavy.
I just read your last feedback, but I can not do revision at this time because the contest has entered the time of judging. Although essentially no change in the concept of these designs. Hopefully you get the best logo of the contest and in accordance with your expectations. Thank you