We could definitely hack the mish with a T-1 or even eclipse like aircraft. It would be a big step back though for sure. It's by no means essential, but having an aircraft that you can fly tactical formation in and fly finger tip with is valuable specifically because its so different from the B-2. Just my opinion, but I think the T-38 is about as perfect of an airmanship builder as can be- which is really the purpose of the companion trainer program- to build up the pilots in the areas they tend to get deficient in while B-2 flying. I will readily admit I'm very biased and love the 38. The real downside would be to have an aircraft that we didn't own. It seems an aircraft you don't own, will be soon cut as budgets continue to be tight.