The fimming does what I wished. The single headbud, „twin‘ed“ into 3 headbuds. The fimming also stops the vegetation, but most times luckily only the node of the headbud! Then does the twinheadbuds build a roof-crown with the other nodes.
Cool, and nice plants. You could also try a 730 nm far red light as a bloom booster. A few seconds at the right time puts the plant into dark mode two hours faster. Like having a 26 h day. Easy, and definitely works. Don’t miss a night and adjust the time to match the shortening days. I use civil twilight as listed on timeanddate.com for my location. Cheers.