In reply to Merlin:
> Lol, I can't belive you're taking this thread so seriously!
Well, nobody else can believe you actually asked the question. Seriously, ask yourself three things:
1) How many grams of weight will you actually really save by drilling hexes?
2) How many grams of weight will you save by having a shit before going climbing?
3) How much will it hurt when you hit the ground after your drilled hex fails?
> What has what grade I climb at got to do with taking weight from climbing gear?!
Nothing. It is a ridiculous idea no matter what grade you climb. Of all the people I've met through climbing, from those who do VDiffs on grit to those who onsight multipitch E7s at Gogarth, I'm 100% certain that not one of them would consider drilling hexes to save weight.
Spend your time doing pull-ups, it'll be much more productive for your climbing!