I have the Galaxy CM-140 on order. Can't wait to try it out with the new improved REW. Just wanted to verify ahead of time whether this SPL meter should be set to fast or slow with REW. I've seen posts say to set it to Fast where as if one is using the Radio Shack SPL meters, it is recommended to set the Radio Shack ones to slow. Why were there suggestions to set the Galaxy to fast? How does this improve things with respect to REW?