Here's the situation...(full game)
1. We are still in Regional/Minor phase, with one more regional left to be purchased. OR1a and OR1b have been completed.
2. In SR2, the last company will float in the 30th slot in operating order, starting the major RR phase.
3. At the beginning of OR2a there is still one more reserved 2+2 in the pool.
Can 3Ts now be purchased, or do we have to wait for the last 2+2 to be purchased? My guess from reading the rules is that 3Ts can be purchased since the major RR phase has started.
For the last RR, MUST it purchase its reserved 2+2, or can it forego it to purchase a higher level train?
Yes, 3Ts can now be purchased.
As for the new RR, it MUST purchase the 2+2 before purchasing any other trains. The only exception to this is if the 2+2 rusts before the new RR operates.