I still have yet to actually recognize a chocolate flavor in bud. I just can't get my taste buds around it, lol. They refuse to acknowledge that the smoke tastes like chocolate. I gave up on chocolate chunk partially out of frustration that it didn't taste like anything, lol.

Force-herm with GA... I have mixed feelings about it... if it's a strain that is very resistant, it's a viable option for someone who knows what they are doing; IMHO if you find yourself in the position where you are DESPERATE to force-herm a plant, you very likely also have the resources to figure out the proper application of GA, lol.

I'd try to force herm in this order:
1) photoperiod stress. Paper bag over plant. Remove randomly. Shine bright light up in there randomly. Or put plant in large cardboard box. Set CFL on timer to go on and off at odd hours.
2) Allow over-ripening 2 weeks past harvest. You SHOULD get some bananas.
3) Induce heat stress. Not that great because first off, where are you going to do that, and second, it WOULD be nice to have a helathy plant at the end of it all
4) Combinations of the above
5) GA. Because you can't use that plant for consumption after.