In Logic Pro, how do I record a stereo mix of my project?

Question

I want to have a tape delay plug-in kick in on the last beat of the song, with a high feedback setting so that last note repeats synced to the beat, and fades out slowly. I have everything tweaked so it sounds just like I want it to if I manually turn on the delay one beat before the last note. Obviously, if i bounce down to  stereo mix normally the effect won't turn on. So the first question is:
1. How can I automate this process so it shows up in the bounce?
If there's no way to do that, then:
2. How do I take the stereo mix  output of my project and record it in real time?
Thanks for your time.
Larry

Answer 1

Hey, Pancenter and Ahrensof, thanks for your help. I briefly tried what you suggested, and probably it would have worked with a different delay. Being  a well-modeled tape delay, suddenly changing the parameters produces artifacts. Then, before I had really spent much time with your ideas, I realized there was a hardware solution. The interface I use, an RME Fireface UFX, has a secondary recording system that records to a Fat 32 USB stick or drive. So I played back the project using the main interface system, clicked the delay on/off switch at the right point manually, and recorded it on the USB system. It worked perfectly.
I suspect that both your solutions would have worked had I spent enough time with them, so I'm going to try to click "solve" on both. I hope the forum software lets me do that. (It didn't. Sorrry Ahrensof, but I gave you a "This helped" and a "like.")
Thanks again.
Larry