Hello I'm excited to contribute. Have been spine testing arrows with dif weight point to find what tip weight+arrow spine my bow liked best. Well i bought a test kit of points up to 250gr but still didnt have total arrow weight where i wanted, so instead of ordering those 100gr brass inserts and waiting 3 days for them to arrive I found that a 6mm 105 gr hornady a max fits pretty snug inside a gold tip shaft shot some fletch glue on it and used a clening rod to push a foam earplug in behind it to hold it still while glue dried. Unless I'm wrong come tommorow I'll be testing up to 350gr point wieght's.