Yes, this one. 
So, in fact, LEE - or possibly HARVEY - changed clothes with Sarah Stanton - who was in on the conspiracy from day one - in the fifth-floor stairwell, and Sarah high-tailed it to the ladies' restroom, where a suitable change back to women's clothing had been in hidden in stall number two. She handed off LEE's clothing to HARVEY (or LEE, as the case may be), and HARVEY (or LEE, as the case may be) simply rappelled out the bathroom window (assuming there was one) on the rope that had been hidden above the light fixture, which Stanton then ... oh, I don't know. did something with. At last, I think it's starting to come together.
What I truly don't understand is that some of the PM enthusiasts seem to be among the most dedicated researchers. How do you dive this deeply into a theory and never step back and ask "WHAT AM I SAYING HERE? Have I completely lost it???" The same can be said of many conspiracy theories, but PM is about the most extreme example that occurs to me.
