i absolutely love heavy bows as most fo you know, but even i will admit, check to see if the person has any experience with bows near that weight as he could really get hurt, and also, if you dont have much experience building bows over 150, i would say no, because if it breaks while tillering, you could get seriously hurt( i dont mean to be doubting your skills in any way by that), ill be honest, i sometimes get scared when tillering warbows, although a better tillering system might help