I drew these diagrams for you to give you an idea of where to make your cuts. ( don't give me shit about them, took all of two minutes to draw all three)

If you are happy with cutting the plants in half, you can. Look at each branch individually and decide if you want to keep the flower on the end or cut and let the smaller flowers closer to the trunk get bigger. As long as you feel good with the ones you removed and left, thats all that really matters...... Oh yeah and after you harvest, get the lights as close as possible. I mean like as close to them without causing heat stress or bleaching. It is really hard to overstress a healthy plant so late in flowering but it is possible......