1. Testicle fullness/size is going to depend on the individual, some people notice this while others dont. Myself, for example, get significantly larger boys when i take DAA.
2. Answered this in your other thread.
3. I would probably stick to 4-8 weeks for the best results. Keep in mind that estrogen usually elevates from d-aspartic-acid, so throwing in something to handle this would always be a good idea. My personal favorite product to stack with DAA is Erase.