Whoa I think You are off on the math a bit if I'm reading that correctly? LOL [:-]
100+100+125+50+20+15ish(insert)+30 (nock adapter)+13grs (nock Bohning Sig)= 453grs
The shaft I think is about 8.5grs inch?, so your shaft alone weighs approx 250grs
So your grand total is actually around..............703grs!?[:-]
I would definitely back off on one of the 100gr front weights. You'll still have around 240grs up front which is PLENTY.