I don' t think is necessary to align your blades with the fletch but if you want to this is what I do. Screw a broadhead into the insert then put 2 drops of bohning powerbond on the insert. Next, stick the insert into the shaft and slowly rotatate the insert around while pushing the insert in. This spreads the bond out evenly. Wipe of the excess so you don' t get a bunch on the end of the shaft. Line your blades up with the fletch, then put your arrows on an arrow spinner and spin it while comparing the end of the broadhead to a fixed point like a line or dot on a piece of paper. Any wobble will be noticeable and since this bonding glue has a 8 hour cure time, you can adjust the insert until it spins true. If is spins straight, it will shoot straight. If you can' t get it at all, take it out, discard the insert and start the process all over again. Set the arrows somewhere with the nock down and allow them to dry. Hope this helps.