BG, I think it depends on your BF% whether or not to add it.

10-13 and I could see it as a feasable addition. higher than that and I think the sides(joint pain) would out weigh the hardness you'd get because the excess BF would cover the effects.

It's debated as to whether winny helps in burning fat. I have seen no actuall studies and probably will never get a chance. A study like that is just not needed for any kind of application.

I like T3 for maintaining fat %, or helping in fat loss. Fina has also helped greatly in cutting as well. Winny, well I am a little biased. I've only used one kind that I absolutely despised.

I you do decide on it, make sure to get a respectable brand.