Correct with one exception that I know of. A Chuck with a 901 fitting. Because of the deep well you may have to use a 901 to 510 and back to a 901.
I saw also "901 battery extenders". Just google it but I am not 100% sure it will work as I didn't try myself.
That could be a solution to use the afs v2 on a FistPack "maybe".
A lot of maybe I know but... that might help.