I am in a very similar situation as you and I have been trying to find answers to this very question. Take a look at 10 USC Chapter 61 Statue 1201. That will drive you to 1208 which is "Computation of Service". There it says the sum of (A) Active Duty and (C) 502 of Chapter 32, this is your 1405 time.
Who originally told you that you could use 1405 time to make 20 TAFMS? That was my impression.
Who originally told you that you could use 1405 time to make 20 TAFMS? That was my impression.