My info is not recent, but in addition to the 1 year ADSC for the PCS, PIT training used to carry a 3 year ADSC. Better look into that before taking Option 3. If you have made up your mind and are definitely getting out, I wouldn't be overly concerned about "how would it look" to the gaining or losing unit. Everyone is short and will need you to get the job done. Do it well and it won't matter in the long run.