150 gn tips would help the spine problem, certainly, but the only way to find out how much help they'd be is to try them. You might half to go all the way to 190's to straighten out your arrow flight. When it comes time for new arrows though, I really think you should go to a different size.

Carbon arrows do use inserts. You have to have a high speed abrasive wheel to cut carbon cleanly. Some guys have made their own cutting fixture using a Dremel tool for their carbons. If you cut them yourself, you need to wear a mask while cutting to keep the dust out of your lungs. Also, I've had problems with carbon arrows being too light for my bows. Even my recurves are loud and have handshock/vibration with unweighted carbons. If you go carbon, I'd recommend getting some Carbon Express weight tubes. I've been greatly unimpressed with the other weighting systems I've seen.

I've gone to strictly cedar arrows again. The only tools you need for cedar is a pocket knife and a tapering tool. I've got a line strung up on the patio. After I taper my shafts, I hang 'em up on that line by the taper with clothespins and spray a few coats of polyurethane on 'em. Or you can get a regular can and wipe the poly on with a rag. I've been shooting wood arrows, at least off and on, since I started out in the 50's and never have dipped a single one.

I lose a lot more arrows than I break, so woodies are cheaper for me.