When building arrows for 3D, what would be your lightest tip you would consider? I'm trying to get the speed up on my 3-39's (100gr now)and have been kicking the idea of lighter points....I am shooting 3-49's with 80 gr parabolic points, with good results,now and was thinking about 60gr points for the 3-39. I guess I have the tinkers.....I can't leave well enough alone. Do you guys think that would be too light for a 26.5" 3-39??