I personally wouldn't go as far as using BO, it's very common among those transitioning M2F especially because it's very potent. So if you want it I'm sure you'll get the desired results but I suggest speaking to a doctor about this first because the results are permanent from what I hear.
I bought a corset bra thing, the band is about 2.5 inches in width and it pushes fat up to the boob area. The "cups" part of the bra is flat though, so although it really gives me the cleavage I need if I want to put on a dress, the flatness of the cups makes it "flappy". I should just buy another design. But these mini corsets are definitely amazing when it comes to the added surrounding fat to the boobs. I love that you mentioned this, I completely forgot about it.
I bought a corset bra thing, the band is about 2.5 inches in width and it pushes fat up to the boob area. The "cups" part of the bra is flat though, so although it really gives me the cleavage I need if I want to put on a dress, the flatness of the cups makes it "flappy". I should just buy another design. But these mini corsets are definitely amazing when it comes to the added surrounding fat to the boobs. I love that you mentioned this, I completely forgot about it.