Tried fimming over a couple of years and will never do it again........results are too slow to recover and too random in their success/failure ratio.
Plain topping can be 100% successful, predictable and less stressful to the plant too.
After trying every "technique" out there over the last 40 years, all I ever do now is LST and very ocassionally a topping if needed to control height on super tall sativas, otherwise, low stress training is the best option and the one technique that causes the smallest amount of disturbance to the plant...imo.