That definitely sucks that you got an under spined arrow, but if you lower your poundage( 5-6 lbs) and cut them a bit, they could work just fine for you, at least for this season if you aren't looking to spend another chunk of dough right now. At your draw length, you should be able to cut off ~1.5" of excess. With the hidden inserts, those can be a bit of a b i t c h to get out, but if you heat up a field point, screw it in, then yank with a pliers they can come out pretty well. It's possible, but not likely, that you can cut off enough arrow to get above the insert without removing it.