Full disclosure, I'm no expert either. I've never done a seed run. The first time I grew I did get a few seeds because my area wasn't light proof, but that was over 20 years ago, lol. I've never done what you're doing.
I agree to wait a bit longer. I just know it takes quite awhile for the seeds to develop, but my plan would be around 3 weeks to introduce the pollen if it was me. But I have no experience so my opinion is shit.
And I already see that some of those balls have erupted and spilled its load on a couple fan leaves. Poor little leaves. Where are those damn Seaman wipes?