I stripped all my zombies an got all 6 squared ,plastic nocks in each end ,weighed 198g each for all 6. going to put some soap In the tub an float ,mark these arrows ,weigh all Inserts,nocks before I put them together an bare shaft test an go from there. I just need a starting point an hope to get one this way. I shot 3 of these fletched zombies this morning that shot goods groups with almost same poi ,then shot the other three an good groups with about the same poi,but off from the other three. I figure I need the right starting point to start then turn,whatever an adj each arrow if nessecary .today I tryed turning my bare shafts off my mark about 1/8-1/4 turn at a time an shot an it changed poi most times ,changed it a lot more than it would have a fletched one .fletching seems to make up for some arrow problems ,bare shafts seem to magnify them.i,m hoping this floating will start me out with all on the stiff side an see how it goes from there. Worked great as I floated them an marked ,each would come right back to the top an roll up the mark when I submerged them an let them go.