Nice! Do you know the total growing time in days?
I've never done a Steem OG with one central nug like that. Both times, I've done them with 4 equal tops, so they're not very large. But it spreads the plant out to get light better (like the scrog strategy) so I prefer it. Probably get about the same total number of trichomes either way, hah.
Good luck with drying. Let me know what it looks like and weighs when it's done :)
Mine has another 20 days or so.