Wondering if you can four fletch with a JoJan. I have the one that does six arrows at a time and have only used three fletch. Do I need a different nock receiver or anything?

the nock receiver has indentions for both 3 fletch and four fletch... you just turn them around and use them.  Pull one of the receivers out and you will see what I mean.  JoJan website has instructions as well.
Bob

Thanks

Bob is right!

yep works great :0)