I only have experience w/ the AD Trads out of a longbow. On those, you do not touch the nock end. I use an aluminum adapter that is epoxied into place to convert the shaft to take standard 5/16" nocks. Others use an Easton bushing w/ an Easton push-in nock. Factory is just the bare shaft w/ a push in nock. You may be in a pickle if you've cut through an epoxied aluminum adapter and/or the shaft itself.
On mine, everything is done up front. Mine are cut to 29" w/ the standard insert(26grains), a steel adapter(100grains), and a 160grain glue on head. I epoxy the steel adapter into the glue on head giving me a total broadhead weight of 260grains. Muzzy makes a proper fitting 100grain brass insert to replace the 26grain insert, and you can get steel adapters from around 75grains through 125grains. In addition, they make a 46grain aluminum adapter. Add to this a plethora of glue on heads, you can come up w/ many different weight combinations.
If for hunting, I'm a firm believer in choosing the broadhead for the game you seek and then build the arrow around that, not vice versa. If bareshafting, I'd match the point weight to the hunting head you choose, but I'm not a believer in bareshafting for tuning a hunting arrow when the end goal is shooting a broadhead. When I was tuning my shaft to find the ideal length/weight combo, I used hot melt glue to affix the adapters into the heads, and I used thumbnail width strips cut from plastic sandwich to affix the inserts to the shaft. This allowed me to shoot the stink out of the arrow w/out it falling apart, yet I could easily remove the components to cut the shaft or change the combo. Once I determined the correct combo, I epoxied everything w/ JB Weld. Some like Devcon 2-Ton.
Daddy Bear