I've seen people on just 100 mg of testosterone develop estrogen issues everybody is going to be different
And these are people who were skinnier than you are so it doesn't necessarily mean a thing if you're skinny or not
GW is a drug it is not a hormone
Having said that just like any drug you don't want to stay on it for too long so I would do 12 or 16 weeks then take a little bit of a break