[lightwinder]

The idea of hiding them in male mode becomes invalid after you reach a certain point.

sfem - I like the Under Armour look!
I know your post was about being less self conscious in public, but I think you've found a great way to hide melons in plain view.
Your Under Armour compression top screams "muscular" to me, instead of feminine. It's all in how it's worn, and the attitude.

Here's sfem's pic, sporting a pair of NBE grown B cups:
   

Here's an Under Armour compression top ad, sporting a pair of buff pec muscles:
   

The Under Armour really brings out the "masculine" look. I'm guessing the Under Armour brand also helps - it seems a lot of muscular men wear them, and have their pec's showing through. It also doesn't hurt if you have a strong pair of biceps, to complete the look. I know when I see a "well chested" guy in a compression top, the first think I think of is muscular pecs. There's subtle differences between the B cups and pec muscles, but I bet most folks wouldn't give it a second thought.

Of course it only goes so far - it probably wouldn't work for DDs, but it *might* work for a C cup?