If yalls plan on using those, start shooting them now. If there is a problem with them it would be good to find out now. Personally I wouldn't start off with a 100 grn. head. Seems like a lot for that shaft and bow. I'd go smaller. The blazers might be just right for you except that the higher profile maybe a problem. I think my kids bow is the same as yours.There's is set up with 35-55 GT. xt 85 grn. thunderhead 2" blazers.