I had a thread along these lines and sure enough thanks to the input of everyone I was able to find the hermies on one of my ladies.
They seem to form where the plant doesn't get good light. in my case at the junction of branches near the wooden stake to prop it up. The buds seemed sparce and on closer inspection I noted a few balls.
I'm going to gicve them 48 hours of dark to pump of the resin in the buds and chop them.
I was thinking of re-vegging them but with balls I don't want to take a chance wasting money on males.