I like 'em small too :-)
My experience so far is only with Aiko3. With this figure it 's possible to dial them even 'almost' completely away without messing the geometry up too much. And i 'm also using magnets a lot to change other bodyparts as well.

Maybe this is gonna be a bit overkill on the topic here, but honestly i can 't understand why a lot of women in real life want to enlarge their breasts via a boob job.

 

Society failed to tolerate me...

... and i have failed to tolerate society