I'm thinking about topping my Dr. Grinspoon i...

Hey there there are a number of ways you can control height topping being one of them. I wouldn't worry too much about her long veg time, you're already committed to it and if anything the longer veg will help , sooner is not always better with topping , as the veg is already that long you probably can wait a few more weeks before topping, in fact that will help the plant recover faster. Another thing you can do later in veg is HST which is bending down some future colas until the crack but dont snap so you can keep them low and have them growing wider. And obviously LST, anchor the plant with a garden hook then use another garden hook to bend the main cola of the plant down so it grows at a bit more than 90° or almost parrallel ... you can do this but bend in less extreme ways but then the plant will be taller. Anyway hope this helps ! 🚀