I have Jo Jan fletchers, (do 6 at a time)
they sell a adapter but 10 bucks a piece and I need 6
so after a few trys came up with this
took old target points 100 grain and screwed the target point in the rear of the arrow fletch end, then took a plastic nock and hot glued it to the target point and as soon as i thought is was right I spun it on a arrow spinner to make sure it was glued true and moving fast if they weren't I moved them to true them, if you are not fast enough they have to be cut off (could use a flat surface like a table also)
If you have a arrow spinner place the arrow on it before glueing or as I said a flat table to check it for trueness, then spin it to make sure its true before it cools
