i jsut purchases stos 145 two blade heads. i sharpened them with a filet kife diamond steel and a ceramic rod. the edges came out shaving all the way to the tip but the tip is not that pointy it starts to round a little to resemble a tanto tip they are still shaving sharp all the way around. i was wondering if the point becoming a steeper angle would hurt penitration or it would help with strenght, or neither?