Another question. I have two bowls for a JC pump. One has a small chunk missing out of one of the inner vanes in the bowl (not large maybe the width of my pinky finger) I dont think I could file it to fix it (too much missing). The other bowl is worn but doesnt have any chunks missing but is more warn. Is the chunk missing on the inner vane a big problem? Will it reduce performance? Should I use the other one that has all the vanes intact but more worn. Thank you!