Well i need some info on broadheads as I am a newby. My first question is 100 gr. or 125 grain? I will be deer and elk hunting, don't know how the two are different other than weight. Also i noticed today at the store many broadheads come in pieces and you assemble them manually, but there are also some already assempled (G5's). Are they hard to put together? Also, should you buy broadheads with replacements or ones you can sharpen on a stone? Lastly, any suggestions? Thanks for my broadhead 101 lesson!