We all brief EFATO. Do you also brief emergency return? I have a tale where that would have saved the day. I ended up crashing the Ovation. Here's the chain of events. 1. Transponder INOP. Needed to ferry the airplane a short 15 minutes flight to get it repaired. Home airport is controlled, and the surrounding airspace is very busy with several control zones and training areas. Even when flying outside of control zones, we routinely get traffic advisories. Without a transponder, I assessed